Ok, any fun things to do at San Francisco at night if your under 21 but over 18?

Me and a couple of friends are going next month, but idk what fun things we could do at night, any suggestions? thanks in advance. oh and by the way, i mean like late at night, like someplace thats open past midnight and all that kinda stuffOk, any fun things to do at San Francisco at night if your under 21 but over 18?
Yeah definitely. That can be done. I USED TO know the answer. If you look on Yelp! you will almost certainly find your answer. But I don't know the place right now.