Guys and alcohol aren't a good mix and it doesn't matter what kind of bar it is.
I have to ask why do you think you HAVE to go to a gay bar?
Not every man in the gay bar is gay there are lots of straight guys that like Tgirls.
You are what is known as conquest material by those types.
If you don't want to be hit on don't go to a bar enfemme. Its common sense.