I know some bars are notorious for hookers, one I have heard of is Shenanigans on Vance Jackson. Are there any others?
Why look for hookers in a bar? They are all listed here. Ask a few you see to go out with you to one.
There's probably a reason they are at a bar, and it's not to meet clients. They are either with a client already, with friends, or with an SO I can imagine.
Is that the place with the goofy shit on the walls and mozzarella sticks?