"Get your drink on"
In both of my visits to Montreal, I always make a point to stop here for a drink or 15. This multilevel bar/club has a little of something for everyone. The first floor is pretty chill and relaxed and the upper floor are more dance/twirk oriented. Try to get there a little early, make some friends on the first floor and go upstairs to dance the night away.
Both the clients and staff are very friendly and helpful. Last year, I lost my wallet and someone turned it in but all of my money and credit cards where still present. :)
The drinks are relatively cheap. But, it you are a "strong" drinker, I would suggest that you stick to martinis or drinks with no mixers. Canada does not do free pours for drinks so if you get a gin and tonic then it will be mostly tonic water. That is why I mention a drink of 15 above.
If you bring a coat on a weekend, they will make you do coat check ($1.50 as of October 2015).