No, its not adult only. Children are definitely welcome there. We have seen Bob, the piano player sing songs geared toward kids, while getting them involved in his act(marching around the room, singing along, etc...).
Bob Jackson is great for everyone! He has a web sight that lists his schedule, but I think it's only for current month. I think he is there Wednesday-Saturday from 8pm- 12am...or something close to that. www.yehaabob.com