Sounds like what you're describing can equally be called a 'No Dickhead's in Here' policy regardless of sexuality. This policy should be strictly enforced in bars, clubs and pubs up and down the country. In fact make that all public places. Can't see any reason why there shouldn't be gay/lesbian only bars. There are many that cater for non-exclusivity so it's not like there's not much choice around and why anybody would want to go somewhere where they're not welcome and not part of the group is beyond me, except that those that do, are often troublemakers. I think a gay bar in ED would be a positive thing. No doubt there will always be those stuck in a mental rut of their own making, but the vast majority of people in ED would be either welcoming or non-plussed.