DON'T. EVEN. THINK. ABOUT. IT.
What's with you and wanting to hit on lesbians? I know it's every guy's dream to have a girl who likes girls, but seriously -- if that's the kind of thing you like you should go for BISEXUAL women, not lesbians. Lesbians wouldn't date/romance a man for anything.
And if you want to know, any man who goes to a lesbian bar better be prepared for serious hate. Do you know how much us lesbians HATE it when men try to hit on us? It's disgusting, insulting, rude, uncomfortable, painfully awkward, stupid, ignorant, etc. If a man tried to flirt with me KNOWING very well that I am a lesbian and do not like men in the slightest, I would slap/punch him across the face for being an obnoxious idiot.
You're just a big upsetter, aren't you?
How about "I'm a pre-op transexual lesbian, and I'm REALLY interested in gay issues. Can't get enough gay attention".
"Can I come home with you. You won't know I'm there"
"do you know any fit gay guys, coz I'm lonely and need a good seeing to"