I live in Windsor and can tell you really what is going on. The above comments are merely speculation and hearsay and hence, are of no value at all to you on your visit.
Firstly, Windsor has been hard hit by a multi-year recession that started many many years ago. You can see it in the many "for sale" and "for lease" signs that dot the streets of the city.
There are no "rub and tug" parlours. The two places that still exist are Cleopatra's on Ouellette Avenue, downtown, and the Buff Spa (formerly Infinity Spa) on Wyandotte West across the street from Leopard's strip joint. Both of these places are expensive and provide no sexual release of any kind.
Windsor also has a bylaw that restricts escorts to outcalls only. By visiting the Backpage ads, one will find that several escorts violate such a bylaw.
Your only alternative is the Backpage or Duttslist ads. There are several massage ladies advertising there. One can also visit the local Windsor escorts site or the London website for additional ads.
My personal jollies are sated by several former strippers whom I employ for massage, really dirty dancing and general making out with sex as an option. You could also avail yourself of Silver's stripjoint or Studio4 to look for take-out or VIP type action, but I would not recommend it. Splooging in a public place is uncomfortable, messy and downright disgusting.
Absolutely, positively, no PMs please. This means you!