www.lgbt.foundation/SWS
Or maybe you'd prefer the women-only wank session - for everyone who self-identifies as a woman some or all of the time (especially if that some of the time happens to be while you are enjoying some self-pleasure).
Or the queer sex session where you can be educated by a transwoman on sex-related prejudices and re-think your concept of sexuality (hmm....I wonder where that one is going....)
How about an introduction to bondage or fetish - or learning how the "sex workers rights movement" fits in with feminism?
For those of you who are not part of the alphabet soup, LGB organisations have not always been like this. There was a valuable provision of groups for LGB people - particularly those who were just coming out - to meet, socialise, discuss issues (and, yes, sometimes then go out drinking and maybe cop off :-) ). But the demographic that services are being provided for has changed massively in just the last few years (and I'm thinking about the Q as much as and possibly even more than the T here).
Originally services were being provided to people who were same-sex attracted (or attracted to both sexes). Some of those people would have been very much opposed to all the bondage, fetish and pro-prostitution stuff outlined above, others would have had a "well, not for me but live and let live" attitude while a minority would have been actively into this stuff.
Now organisations and services are for the "queer" community which outsiders and funding bodies seem to think is another word (maybe slightly more inclusive) for the same people but it isn't. Queer has now come to mean having a particular viewpoint (ie "sex positive", pro-kink, pro-transactivism, negative attitude to lesbians for not being "open-minded" enough to have sex with males). Some LGB people do not share this view and are alienated from the organisations and services while many people who we would previously have regarded as heterosexual identify as being queer and embrace all this. Meanwhile, young same-sex attracted people tentatively coming out and looking for a community are thrown into this world of kink and fetish and told that this is their community.