I went clubbing pretty religiously in college, and I work as a consultant for a lot of nightclubs and bars now so I have a bit of experience even though I'm not a huge fan anymore. What's the location like where you are? Rural, suburbs, city, etc. Geographic area would be helpful if you're willing to share, but not necessary. Rural gay bars have a totally different feel that ones in more populous areas.
Girls at a gay bar are complicated. Either they are some degree of L or B, or they are just there to dance in a place where they won't be bothered by dudes. If you are not a creepy looking dude and you don't get handsy, girls are usually down to dance with you in a gay bar. At least in my experience. That is why you'll often see guys and girls dancing together there. They are usually pretty friendly too. If you are looking for a quick way to get in with a cute guy, go talk to the girls that he's hanging out with and tell them you think he's cute. They will help you out.
The gays are a feely people. I personally wouldn't feel comfortable without a packer in that situation. I don't really see it as false advertising. More so breaking down a potential barrier.
Have you thought about maybe trying to meet people online and then suggesting it as a meeting place? Maybe even specifically making a post saying that's what you're looking for. And to that end, what are you looking for? You could have a lot of luck making new friends or finding a hook up in a bar, but I've never known anyone who found something long lasting. So if that is your goal, I'd find another way to pursue it.