Different girls have different things they can do, ranging from the famous banana tricks to shows involving massage oil, vibrators and the most unique way you will ever see a postcard written on in your life.
In these establishments, visitors pay an entrance fee to watch stage shows ranging from stripping to girls performing tricks with ping pong balls and candles all the way to live shows where couples have sex on stage.
The general rule is that the closer you are to the city centre the more expensive your romp is going to be, but as with most things in life more expensive doesn't necessarily mean better.
Since then many more have followed, with the real influx of gay bars and hotels happening from 1955 onwards.