I have NO CLUE what the name of this club is (I was drunk by the time we left Dagobert and came here) but it evidently serves as the afterhours club for all the partykids in Quebec, though it opens early and serves alcohol until closing.
The dancefloor is small, but there were all types of people dancing there, and the music was GREAT! Best of all, it's only 2 blocks uphill to the hostel!
Just walk down to Rue Ste Jean where Rue Ste Ursule meets it and you'll hear the upstairs club. Coat check is a buck.