updated code

<?php
// Options
$date_format = get_option( 'date_format' );
$time_format = get_option( 'time_format' );
// Load Venue View Helper
EE_Registry::instance()->load_helper('Venue_View');
//Defaults
$reg_button_text = !isset($reg_button_text) ? __('Book Now', 'event_espresso') : $reg_button_text;
$alt_button_text = !isset($alt_button_text) ? __('View Details', 'event_espresso') : $alt_button_text;//For alternate registration pages
$sold_out_button_text = !isset($sold_out_button_text) ? __('Sold Out', 'event_espresso') : $sold_out_button_text;//For sold out events
$category_filter_text = !isset($category_filter_text) ? __('Training Course', 'event_espresso') : $category_filter_text;


if ( have_posts() ) :
// allow other stuff
do_action( 'AHEE__espresso_events_table_template_template__before_loop' );
?>

<?php if ($category_filter != 'false'){ ?>
<p class="category-filter cat-filter-selector">
<label><?php echo $category_filter_text; ?></label>
<select class="" id="ee_filter_category">
<option class="ee_filter_show_all"><?php echo __('Show All', 'event_espresso'); ?></option>
<?php
$taxonomy = array('espresso_event_categories');
$args = array('orderby'=>'name','hide_empty'=>true);
$ee_terms = get_terms($taxonomy, $args);

foreach($ee_terms as $term){
echo '<option class="' . $term->slug . '">'. $term->name . '</option>';
}
?>
</select>
</p>
<?php } ?>
<?php if ($venue_filter != 'false'){ ?>
<p class="category-filter loc-filter-selector">
<label><?php echo 'Location'; ?></label>
<select class="" id="ee_filter_venue">
<option class="ee_filter_venue_show_all"><?php echo __('Show All', 'event_espresso'); ?></option>
<?php
$taxonomy = array('espresso_event_venues');
$args = array('orderby'=>'name','hide_empty'=>true);
$ee_terms = get_terms($taxonomy, $args);
?>
<?php
while ( have_posts() ) : the_post();
global $post;
$event = EEH_Event_View::get_event();
$venue_city = '';
// get first related venue and convert to CSV string
$venue = $event->venues(array('limit' => 1));
if (is_array($venue) && ! empty($venue)) {
$venue = array_shift($venue);
if ($venue instanceof EE_Venue) {
$venue_city = $venue->city();
$venue_url = get_permalink($venue->ID());
}
}
echo'<option value="'. $venue_city .'">'. $venue_city .'</option>';
endwhile;
?>
</select>
</p>
<?php } ?>

<?php if ($footable != 'false' && $table_search != 'false'){ ?>
<p>
<?php echo __('Search:', 'event_espresso'); ?> <input id="filter" type="text"/>
</p>
<?php } ?>

<table id="ee_filter_table" class="espresso-table footable table" data-page-size="<?php echo $table_pages; ?>" data-filter="#filter">
<thead class="espresso-table-header-row">
<tr>
<th class="th-group"><?php _e('Event','event_espresso'); ?></th>
<?php if( $show_venues ) { ?>
<th class="th-group"><?php _e('Location','event_espresso'); ?></th>
<?php } ?>
<th class="th-group"><?php _e('Start Date','event_espresso'); ?></th>
<th class="th-group" data-sort-ignore="true"><?php _e('Trainer','event_espresso'); ?></th>
<th class="th-group" data-sort-ignore="true"><?php _e('Price','event_espresso'); ?></th>
<th class="th-group" data-sort-ignore="true"></th>
</tr>
</thead>
<?php if ($footable != 'false' && $table_paging != 'false'){ ?>
<tfoot>
<tr>
<?php echo '<td colspan="' . ($show_venues ? '6' : '5') . '">'; ?>
<div class="pagination pagination-centered"></div>
</tr>
</tfoot>
<?php } ?>
<tbody>

<?php
// Start the Loop.
while ( have_posts() ) : the_post();
// Include the post TYPE-specific template for the content.
global $post;

//Debug
//d( $post );

//Get the category for this event
$event = EEH_Event_View::get_event();
if ( $event instanceof EE_Event ) {
if ( $event_categories = get_the_terms( $event->ID(), 'espresso_event_categories' )) {
// loop thru terms and create links
$category_slugs = array();
foreach ( $event_categories as $term ) {
$category_slugs[] = $term->slug;
}
$category_slugs = implode(' ', $category_slugs);
} else {
// event has no terms
$category_slugs = '';
}
$venue_city = '';
// get first related venue and convert to CSV string
$venue = $event->venues(array('limit' => 1));
if (is_array($venue) && ! empty($venue)) {
$venue = array_shift($venue);
if ($venue instanceof EE_Venue) {
$venue_city = $venue->city();
}
}
}
//Create the event link
$external_url = $post->EE_Event->external_url();
$button_text = !empty($external_url) ? $alt_button_text : $reg_button_text;
$registration_url = !empty($external_url) ? $post->EE_Event->external_url() : $post->EE_Event->get_permalink();

//Create the register now button
$live_button = '<a id="a_register_link-'.$post->ID.'" class="a_register_link" href="'.$registration_url.'">'.$button_text.'</a>';

if ( $event->is_sold_out() || $event->is_sold_out(TRUE ) ) {
$live_button = '<a id="a_register_link-'.$post->ID.'" class="a_register_link_sold_out a_register_link" href="'.$registration_url.'">'.$sold_out_button_text.'</a>';
}

// If the show_all_datetimes parameter is set set the limit to NULL to pull them all,
// if not default to only display a single datetime.
$datetime_limit = $show_all_datetimes ? NULL : 1;

// Pull the datetimes for this event order by start_date/time
// $datetimes = EEM_Datetime::instance()->get_datetimes_for_event_ordered_by_start_time( $post->ID, $show_expired, false, $datetime_limit );

// Reset the datetimes pointer to the earliest datetime and use that one.
//$datetime = reset( $datetimes );
$datetimes = EEM_Datetime::instance()->get_datetimes_for_event_ordered_by_start_time( $post->ID, $show_expired, false, 1 );

$datetime = end( $datetimes );

if ( ! $event->is_sold_out() ) {

// grab array of EE_Ticket objects for event
$tickets = EEH_Event_View::event_tickets_available( $post->ID );

// grab first ticket from array
$ticket = reset( $tickets );
//check if the ticket is free, if set the ticket price to 'Free'
if ( $ticket instanceof EE_Ticket ) {
$ticket_price = $ticket->pretty_price();
$ticket_price_data_value = $ticket->price();
$ticket_price = $ticket_price_data_value == 0 ? __( 'Free', 'event_espresso' ) : $ticket_price;
}

//Get the remaining ticket values for the next datetime.
$tickets_remaining = $datetime->tickets_remaining() === EE_INF ? __('Unlimited','event_espresso') : $datetime->tickets_remaining();
} else {

//The event is sold out, set the ticket price to 'N/A'
$ticket_price = __( 'N/A', 'event_espresso');
}

// Pull trainer for this event
$people = EEM_Person::instance()->get_people_for_event_and_type($event_id = $post->ID, $people_type_id = 24);




if ($datetime instanceof EE_Datetime) {
?>
<tr class="espresso-table-row <?php echo $category_slugs; ?> <?php echo $venue_city; ?>">
<td class="event_title event-<?php echo $post->ID; ?>"><a href="<?php echo $registration_url; ?>"><?php echo $post->post_title; ?></a></td>
<?php if( $show_venues ) { ?>
<td class="venue_title event-<?php echo $post->ID; ?>"><?php echo '<a href="'.$venue_url.'"'.$venue_city.'</a>'; ?></td>
<?php } ?>
<td class="start_date event-<?php echo $post->ID; ?>" data-value="<?php echo $datetime->get_raw( 'DTT_EVT_start' ); ?>-<?php echo $datetime->get_raw( 'DTT_EVT_end' ); ?>">
<ul class="ee-table-view-datetime-list">
<?php
// Loop over each datetime we have pulled from the database and output
foreach ($datetimes as $datetime) {
$startDateTime = $datetime->get_raw( 'DTT_EVT_start' );
$endDateTime = $datetime->get_raw( 'DTT_EVT_end' );

$start = new DateTime();
$start->setTimestamp($startDateTime);

$end = new DateTime();
$end->setTimestamp($endDateTime);

$interval = $start->diff($end);

$intervalInteger = $interval->format('%d');
$intervalInteger += 1;


?>
<li class="datetime-id-<?php echo $datetime->ID(); ?>">


<?php echo date_i18n( $date_format, strtotime( $datetime->start_date_and_time('Y-m-d', 'H:i:s') ) ); ?>
<!-- to <?php echo date_i18n( $date_format, strtotime( $datetime->end_date_and_time('Y-m-d', 'H:i:s') ) ); ?> -->

- <?php echo $intervalInteger ?> <?php echo $intervalInteger > 1 ? 'days' : 'day' ?>




</li>
<?php
//end foreach $datetimes
}
?>
</ul>
</td>
<td class="trainer"><?php
// Loop over each datetime we have pulled from the database and output
foreach ($people as $people) {
?><a href="<?php echo get_permalink( $people->ID() ); ?>" target="_blank"><?php echo $people->full_name(); ?></a><br />
<?php
//end foreach $people
}
?>
</td>

<td class="price"><?php echo $ticket_price; ?>
</td>


</th>
<td class="td-group reg-col" nowrap="nowrap"><?php echo $live_button; ?></td>
</tr>
<?php
}
endwhile;
echo '</table>';
// allow moar other stuff
do_action( 'AHEE__espresso_events_table_template_template__after_loop' );

else :
// If no content, include the "No posts found" template.
espresso_get_template_part( 'content', 'none' );

endif;