The last time I went (with a female friend for fun) I was told that I had to be with a guy. So I said, “We’re with that guy right there.” He turned around, said “Yeah, they’re with me.” We walked inside and he went his way and we went ours. Never seen him before in my life. Even if there is a rule like that, there are ways to get around it pretty easily.
The next time we went, we didn’t have any trouble getting in. Then again, the fact that this drunk guy kept buying me lap dances from this bio major who discussed the cost of books and the merits of instructors with me while shaking her tits in my face and raking in the dough didn’t hurt. The girls kind of like when other females are there and they can play it up and get better tips from all the horny guys who love a girl on girl thing.
The only thing I can think of with discriminating against lesbians is the possibility that customer’s expressions of sexuality might distract the other paying people from what they’re supposed to be paying for. You said that you probably would have started making out, I can see how this might be a bit of a distraction from what’s happening on the stage that people are supposed to be paying attention to. Probably something they’ve thought about too.