I don't see what the harm would be in a LGBT lounge. I don't really post in the current lounge thread because a) the topics never interest me, and b) I find it hard to jump into the conversation. It'd probably be the same with the LGBT lounge, though it may be easier to jump into the conversation.
Also, if this is created, religious zealots probably shouldn't be allowed to condemn homosexuality or open up a debate on it whatsoever. Obviously, the intention is for the LGBT community to post there. We don't need to be told that we're 'living in sin' and so on and so forth. It just wouldn't be very polite.