Having spent the past few months visiting a lot of gay clubs, I've noticed some trends. Most gay men will completely ignore a crossdresser in a club, which is fine with me. A small percentage will compliment your outfit and treat you nicely. Another small percentage will come on to you.
When I inform a gay man that I'm straight, the most common reaction is shock. In my experience, they are just as ignorant about hetero CDs as the general public.
My best experiences have been with lesbians. I always got along well with them but en femme, even better. They treat me very well and a few have become regular friends.
Honestly, I love most gay people because I'm treated well. I think the fact that we share a common bond and a common "enemy", brings most of us closer.