Use the post__not_in
Argument of wp_query like this
$query= new WP_Query(array('post_type' => 'rooms', 'post__not_in' => array(164));
Use the post__not_in
Argument of wp_query like this
$query= new WP_Query(array('post_type' => 'rooms', 'post__not_in' => array(164));