I looked up news stories on prostitution arrests. All I can find is the human trafficking stings and the underage girl sting. I would not touch a streetwalker. If you are worried, your best bet is The Studio (now Soma Effluerage Spa). The police have left them alone for years, and they have to know what things are happening in there. That said, I recommend Ivy at the South location (I think the North location is dead). She has the body of a 16 year old cheerleader and doesn't charge extra (at least me) to give you a good ride (though you should bring a good tip for her).