I don't know about clubs since I don't go to them much anymore but there definitely seems to be more women on SecondLife period. Maybe some stats out there? Though I guess people can lie. Eh.
I think I have 2 straight women on my list?? The others are bisexual or lesbian. I get approached way more by women than men and it's crazy because I have nothing on my profile alluding to me being lesbian or bisexual, and this happens in random places. I honestly think a lot of them are men wanting to see some hot lesbian pixel action. Oh yeahhh! *Macho Man voice*