Gay bars/club (whatever) are not a monolith. They are like any other bunch of bars and clubs. They range from dives to places that are so hip, so happening, so up-to-date that it hurts.
I go to such places, for the same reason I go to another place, because I like the vibe/ambiance/company/event. I mean there are nights when I'm ready to paint the town red, and since I love to dance, I'll hit up one of the dance clubs (besides I like raising the average age by 8 years just by walking in). But - you'll have to trust me on this one - if you are not in the mood for Hi-NRG, 110db, bass thumping, volume pumping and fantastically repetitive 21st Century dance music it will be its own slice of hell. Just like that quite little place - so nice to grab a back table in and have long conversations into the wee hours - doesn't seem 'quite' when you want to rock out, it seems like death warmed over.
I've been in places where I've got that "What are you doing here look". I'm also sure I've been in places and given that look to others so it all evens out in the end.
And any really 'cool' gay bar is not even going to be all that gay sometimes - they have a bad tendency to get overrun by tourists.