There is one in the Countryhills area of Kitchener behind a Domino's Pizza, but they're only open Monday-Fri till 9 pm.
I've stopped by a few times and the only MPA there was a 40ish oriental lady - on those occasions I just left.
However, about a month ago I stopped by and found two young twenty-somethings working there, both quite attractive.
However, as I said in a previous review, if you are going to go it's good to learn Vietnamese first! Barely any English is spoken which sadly means that it is next to impossible to get N, NR or any other goodies associated with a high end MP.
$40 for half hour, $70 for the hour with a $20 tip expected for a happy ending.
Hope that helps.
Dhalsim