I went with a girl I'd been messing around with. Her best friend and one-time roommate was a gay guy and she'd become friends with a lot of gay guys over time, basically 75% of her friends were gay. We were making plans, didn't really have anything in mind and one of her friends invited her out, she was like, "Would you want to come? It's okay if you don't."
To me, it wasn't about having something to prove, trying to impress her or anything but I didn't have anything else to do so I figured I'd go, I could leave if was uncomfortable or it wasn't fun. She wasn't my girl or anything, we'd just hook up, so I'd only met a couple of her friends but they were cool and there wasn't any pressure.
Anyway, it was fine...I met a bunch of good people. She made it a lot easier by introducing me as her straight friend but all of the dudes were really nice and respectful, they joked around in general and it seemed like they were just having fun in their environment. Nothing over the top, did see some guys making out and I'd rather not have to watch people, gay or straight, all over each other but whatever. Some of the dudes were flamboyant and others were just guys you'd not really be able to just guess their sexuality. There were a lot of females there too, I wasn't trying to make any moves so they could've been gay or straight.
Only thing that happened that some of you would be uncomfortable with was a friend of one of her friends showed up while she was in the bathroom/then getting us drinks. Her friends and I had just been talking about everyday stuff and they introduced us (the new guy was with a couple other guys) but just said I was her friend. He started hitting on me but it wasn't anything offensive, made a comment about my eyes, couple other things but when my friend's friend realized, he told him I'm straight, we laughed and that was it. She came back, we told her and she saw everything was fine...no harm, no foul.
I'm open to accept any kind of person as long as they're a good person, fun, interesting, have personality. It doesn't mean I have to be like them, seek out trying to fit in their environment or pretend.
My point is, you don't have to feel comfortable with it but I think some of the pre-conceived notions people have are a little unfair in terms of the people and the scene. Yeah, there are some over the top gay clubs and flamboyant homosexuals but I think people seem to focus on that and forget that there are a lot of others that you'd be cool with if it weren't for these fears (for whatever reason). It's lame when anyone generalizes about a whole group of people due to the actions of what they consider the worst of that group.