While I understand you need for expression... please understand this is a PG or 15+ grid. all walks of life or lifestyles are welcome .. but it is not required to be advertised! Do you want a area that you feel " safe in" or a lable that you can wear? There is no advantage in advertising you gender likes in a region or sim.. and if its for motives other than teen mature ... well there is always seconfd life. Im sure your familliar with it.
But as you correctly mentioned there are some communities tha feel the need to be represented.. hence opensim project.. do a search and knock ya socks off.
Personally . Im here to avoid the BS and politics from SL , to build in total freedom and just enjoy. If you feel you need to have a special group then thats not very open source is it?We are one cool group united by the freedom to build, test, tweek, and crash under the flag of Openlife. Everyone is welcome and no ones special! We are just Openlife! Enjoy

PS that is about as political/groupish as Im going to do ... ever in this world.