http://en.wikipedia.org/wiki/Pantomime
“The gender role reversal resembles the old festival of Twelfth Night, a combination of Epiphany and midwinter feast, when it was customary for the natural order of things to be reversed. This tradition can be traced back to pre-Christian European festivals such as Samhain and Saturnalia.”
Pantomime is a form for play usually performed around Christmas time in the UK. Audrey and Brenda remind me of the ugly sisters in the pantomime Cinderella, except this time they are cleaning the floor as Cinderella would.
http://www.thisislondon.co.uk/theatre/review-23427564-cinderella-fails-to-press-the-right-buttons.do
http://www.visit4info.com/advert/Brendas-Bounty-Changes-to-Plenty-Bounty-Kitchen-Paper/69968


The reason I think that Audrey and Brenda do not give the impression they are homosexual or in drag, is because they are still clearly masculine men, there is no illusion, what you see is what you get, men in dresses.