Was reading a history book yesterday about debauchery in Olde Englande. (I have strange tastes in reading matter!) Apparently there were several clubs of ill repute in London in the 18th Century, where men (presumably transvestites) met to cross-dress in private and hold rather drunken parties. These were universally called 'Molly Houses'. A 'Molly' was a term for an effeminate man who liked female-style attire. I suppose this is the origin of 'Molly' in Molly Dancing, where the original groups comprised males only, dressed bizarrely in women's clothes. (I hasten to add I have no problem with transvestism. Each to his own!)