[princessmarisa]

As far as I am aware the whole area is called water play, or wet play, something similar.

I will find my sources later, but I remember reading that full on prostitution is harder to find and quite rare, but most hostess bars will have back rooms for massages and such.

The places that do prostitution tend to mainly have girls who emigrated from other parts of Asia, sometimes working illegally. The higher up hostess bars and less-seedy massages are mainly Japanese girls and at the top of the food chain are the tall/blonde western beauties who often don't do anything seedy unless it involves a specially arranged private date and will cost you an absolute fortune in time and money. I believe they are called dohan.

It was mainly salarymen I saw going into hostess bars and other places covered by the telltale plastic hangdown sheets of half naked anime girls..or places with profile style photos of girls stuck outside.

Not sure about strip-clubs in the western sense. Not sure that is all that well known in Japan.