Just construct what you need outside of the main query.
// terms to search
$meta_query_keys = array('Panera Group 2 Encino', 'West Hollywood');
// start the meta query off
$meta_query = array('relation' => 'OR');
// add terms to query
foreach($meta_query_keys as $key) {
$meta_query[] = array(
'key' => 'user_group_name',
'value' => $key,
'compare' => 'LIKE',
);
}
// construct main query
$wp_user_query = new WP_User_Query(
array('role' => 'Subscriber',
'fields' => 'all',
'meta_query' => $meta_query,
));