To add to Bozo's point, I am aware of two other cities with at least three male strip clubs:
Ft Lauderdale/Wilton Manor has three (gay) male strip clubs, but they are not fully nude.
Puerto Vallarta has four male strip clubs and all feature full nudity, but one location is only seasonal. But Montreal's diversity and quality of men can be more appealing than Puerto Vallarta's.
Portland briefly had three male strip that were fully nude, but is now down to two.
Too bad for me that Montreal is the furthest city compared to the other cities I mentioned above. I truly love my visits to Montreal primarily for the strip clubs, but find myself going to the other cities mentioned above because they are more convenient for me to visit on holiday.