Where do police stations usually catch prostitutes?

Hotels, bathing places, hair salons, massage rooms, karaoke bars, leisure and entertainment clubs, etc.

One is mass reporting, media exposure, etc. One is found in the work, and the people who report it must be investigated by the police immediately, while the second, especially the large entertainment places involving pornography and drugs, usually have to operate for a long time, and plainclothes investigations will be carried out only when there is conclusive evidence and the time is ripe, because moving to such a place has great social impact and there is no possibility of failure. In layman's terms, it is to grasp the present.