Don't know about Manhattan, but in Hawaii, they get raided quite often.  Or they set up a sting to catch you.  A long time ago, they allowed the AMP's because they wanted to get the prostitution off the street, now they want to hit the less discreet as well I guess.

you often see stickers on their door claiming to have contributed to the Policeman's Benevolent Association.

Nuff said?