I've been through this many times. You'd think venue owners would figure stuff like this out, but no, they often don't, usually because they aren't musicians.
Several years ago, we were playing at Nardi's, a very popular club on Long Beach Island at the Jersey Shore. We had to bring gear through the front door. It wasn't a problem at the start of the night, because the place wasn't crowded, but when we tried to load out, we had to fight our way through dozens of drunk twenty-somethings to get through the door. Of course, I had to make multiple trips, while the house DJ was blasting hip-hop and techno dance music at ear-splitting volume. I was growing more and more angry by the third trip. I had to say, "Excuse me" about four times to one sloppy drunk woman. I almost physically pushed her out of the way, but didn't, figuring a stunt like that would get the band fired.
Hey Bo, who is the cute blonde on the left? LOL!