Wordpress display list of posts according to custom taxonomy

<?php while ( have_posts() ) : the_post(); ?>
    <?php if (is_page(171)) {  //create variables for the venue type
        $venueType = 'event-venue';
    } else {
        $venueType = 'reception-venue';
    } ?>
    <?php get_template_part( 'content', 'page' ); ?>

    <?php
        $post_type = 'venues';
        $tax = 'venue-city';
        $tax_terms = get_terms($tax,'hide_empty=0');


        if (is_page(12) || is_page(171)) {
        //list everything
        if ($tax_terms) {
          foreach ($tax_terms  as $tax_term) {
            $args=array(
              'post_type' => $post_type,
              'venue-type' => $venueType, //test to see if we can add another dimension
              "$tax" => $tax_term->slug,
              'post_status' => 'publish',
              'posts_per_page' => -1,
              'caller_get_posts'=> 1
            );

            $my_query = null;
            $my_query = new WP_Query($args);
            if( $my_query->have_posts() ) {
              echo "<h2 class=\"category-title\" > $tax_term->name </h2><ul class=\"page-listing\">";
              while ($my_query->have_posts()) : $my_query->the_post(); ?>
                <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
                <?php
              endwhile;


            }echo "</ul>";
            wp_reset_query();
          }
        }
        } else {

        //list everything
        if ($tax_terms) {
          foreach ($tax_terms  as $tax_term) {
            $args=array(
              'post_type' => $post_type,
              //'venue-type' => 'event-venue', //test to see if we can add another dimension
              "$tax" => $tax_term->slug,
              'post_status' => 'publish',
              'posts_per_page' => -1,
              'caller_get_posts'=> 1
            );

            $my_query = null;
            $my_query = new WP_Query($args);
            if( $my_query->have_posts() ) {
              echo "<h2 class=\"category-title\" > $tax_term->name </h2><ul class=\"page-listing\">";
              while ($my_query->have_posts()) : $my_query->the_post(); ?>
                <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
                <?php
              endwhile;


            }echo "</ul>";
            wp_reset_query();
          }
        }}
        ?>
    <?php endwhile; // end of the loop. ?>