So why do you care about this issue at all then? The LGBTI community have welcomed it, why can't you?
This membership promotes a point of difference and segregation, rather than promoting equality. By creating something entirely new and different only for gay people, it defeats the purpose of preaching equality.
Ok we want everyone to be equal, but just in case you want to be different, here's a special membership only you have access to and perhaps even a place only you can sit.