Or, embed this snippet using GenerateWP WordPress Plugin.

Download

Clone

meta_query – event id

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'mec_event_id',
		'value'   => '$EVENT_ID',
		'compare' => '=',
		'type'    => 'CHAR',
	),
);