The kids who want to hang out will always find a place to go-at least they are hanging out locally and eating kosher. There are many that are hanging out-far from kosher areas and are mingling with non Jews. Those are the ones that are in the greatest sakana.
It would be nice if there were separate youth groups that had oneg Shabbos and melave malka activities. They could be held in a hall and be teamed up to help tzedaka organizations, handicapped, and even have guest speakers that know teens and can do workshops on all kinds of interesting topics.