Their website still lists Wet T-Shirts as every Tues. It seems to be a fairly well maintained website now. It's got the next lube wrestling listed for this Thurs, so I would hazard a guess that the wet t's are still going on.
I've never been to a Wet T-Shirt night but the lube wrestling always has University students or same age girls.
The manor is located in Guelph just off the Hanlon(hwy 6) on Wellington. Hard to miss. It's the building with the neon naked ladies.
http://www.manorlive.com/