I’m a straight dude. IMO, I should be just as welcome at a “gay” bar as “gay” folks are at any other place. I’ve been chatted up respectfully by dudes in gay bars and had a “twink” try to shove his hands down my pants (and a few experiences between). The former is how people of all genders should be treated at all bars. Sure, it’s more likely that you’ll get chatted by a dude at a gay bar, but believe it or not, the last guy that asked me out was at a decidedly NOT gay bar.