Cameras in parlors?

I know obviously there has to be some cameras, most likely in the store front, but does anyone have any actual experiences/factual info on this topic? Specifically in the rooms or any recording/cams of your own? I'm pretty sure the girls wouldn't be too fond of it and you'd be better off asking if you were going to record them, but then that might even be going too far. I'm more interested in vice versa as I wouldn't be too happy finding out I was definately being recorded, but i'm sure it happens all the time.