No one I hang out with is gay, but occasionally someone will bring along a gay guy and we'll all go to a bar. I watch what I say for the first 6 or 7 beers, then I forget their gay and sometimes unintentionally insult them.
Gay guys are great in areas where a certain percentage of the population is a transexual... they can spot those right off the gun and save you a lot of pain and remorse.
-SW