In my "DJ school", the mentioned Plantation Club, the shift started at 10, but there was rarely dancing going on before midnight. Room to DJ for me and the staff and wildly mix and try out all the new purchases. For cultivated and stimulating entertainment, partly also with snippets of speech from radio play records or the like. I like to use this technique for film premieres, to let the film and its musical world leave a trace in the audience. The dancing could be done later.