Gentlemens Evenings were a fairly regular event in many OR's clubs up until the early 90's which were usually well attended. Along with simillar but often more riotous events in rugby clubs etc which ISTR made the News of the World on more than one occasion.
The last one I remember attending was in the Skyways club at Wyton about 1992. In the spirit of equal opportunities there was reciprocal entertainment laid on for the good ladies of Wyton the following week, which by all accounts was worse!
Then there was the topless mud wrestling night also in the Skyways.......but thats another story!