// Get current cat
$my_cat = tribe_get_event_meta($post->ID,'tribe_events_cat',true);

// The Query
$args=array(
	'post_type' => 'tribe_events',
	'tribe_events_cat' => $my_cat,
	'posts_per_page' => 6,
	'orderby' => 'date',
	'order' => 'ASC'
);
$the_query = new WP_Query($args);