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HTML

<?php
/**
 * Updated additional-fields.php code
 */

if ( ! isset( $fields ) || empty( $fields ) || ! is_array( $fields ) ) return;
$event_passed = tribe_get_end_date( null, false, 'Y-m-d H:i:s' ) < date( 'Y-m-d H:i:s' );
?>

<div class="tribe-events-meta-group tribe-events-meta-group-other">
	<h3 class="tribe-events-single-section-title"> <?php _e('Other', 'tribe-events-calendar' ) ?> </h3>
	<dl>
	<?php foreach ( $fields as $name => $value): ?>
        <?php if ( 'Tickets' === $name && $event_passed ) continue; ?>
		<dt> <?php echo $name ?> </dt>
		<dd class="tribe-meta-value"> <?php echo $value ?> </dd>
	<?php endforeach ?>
	</dl>
</div>



<?php
/**
 * My single-event.php code
 */

if ( !defined('ABSPATH') ) { die('-1'); }

$event_id = get_the_ID();
$event_passed = tribe_get_end_date( null, false, 'Y-m-d H:i:s' ) < date( 'Y-m-d H:i:s' );
?>

<!-- start bootstrap -->

<div class="single-event">
<div class="row">
  <?php while ( have_posts() ) :  the_post(); ?>
  <div class="row">
    <div class="col-xs-4">
      <div> <?php echo get_the_post_thumbnail($post->ID, 'thumbnail', array('class'=>"img-responsive thumbnail"));?> </div>
      <a href="<?php echo esc_url( tribe_get_custom_field( 'Tickets' ) ) ?>" target="_blank">
      <button class="btn btn-default btn-tickets btn-lg col-xs-12">Buy Tickets</button>
      </a>
      <div class="clearfix"></div>
      <div class="well well-location">
        <h4 class="text-center"><?php echo tribe_get_venue(); ?></h4>
        <h5 class="text-center"><?php echo tribe_get_address(); ?><br>
          <?php echo tribe_get_city(); ?>, <?php echo tribe_get_state(); ?>, <?php echo tribe_get_zip(); ?></h5>
        <h4 class="text-center"><?php echo tribe_get_phone(); ?></h4>
      </div>
      <?php if (tribe_get_custom_field( 'Fine Print' )): ?>
      <div class="well well-fineprint"> <?php echo tribe_get_custom_field( 'Fine Print' ) ?> </div>
      <?php endif; ?>
      <?php if( tribe_embed_google_map( get_the_ID() ) ) : ?>
 ...