In Person View

// WP_Query arguments
$args = array(
	'post_type'              => array( 'listing' ),
	'post_status'            => array( 'published' ),
	'posts_per_page'         => '-1',
	'meta_query'             => array(
		'relation' => 'AND',
		array(
			'key'     => 'listing_in_person',
			'value'   => '1',
			'compare' => '=',
			'type'    => 'CHAR',
		),
	),
);

// The Query
$query = new WP_Query( $args );