Their here, their queer and they want a beer.
I'm okay with the beer part.
Actually, some years ago, the local gay-friendly bar had the best pool table around, and there was no problem stopping over to shoot a few rounds and have a few beers. It wasn't gay-only; anybody was welcome as long as they didn't make trouble. (I never got hit on, which was fine.)
> ...two intoxicated patrons made sexually explicit movements...
That leaves a lot of room for interpretation. I imagine it was something more than just flipping the bird...