Do you mind me asking wether this is because you are a fan of cinema or just because you want to "get your rocks off" to women getting it on? If it's the later I would suggest just hire a porno (or surf the net for five minutes - so I've been told *ahem*). If it's the former then it shouldn't matter whether it's a gay/lesbian film it's wether you like it as a film or not that should matter.
How could I forget "When night is falling" and "Go Fish"?
I've just treated myself to "Girl Play" a romcom. The blurb says that it is based on a play "Real Girls" set in LA. No idea if it will be any good, but something to look forward to watching.