There are a few places and events where you can find fixie riders here in Montreal. One would be Café Cagibi. It's located on the corner of St-Laurent and St-Viateur. Another place would be the foufounes électriques. It's a bar where a lot of CEGEP, university and other types of students hang out for a good drink and good fun. There are Thursday night rides where a bunch of people (including myself) meet up for some good ol' fun. We meet up at Phillip's Square on the corner of Union and Ste-Catherine (in front of the Bay) at 8:30 PM and we ride out at 9:00 PM. We never know where we're going until we leave.
There are also a few bike shops you can swing by to get some extra info on the scene and the events to come. One of them is the Belleville Bike Co-op and another is Revolutions. Revolutions is located on Amherts above Maisonneuve and Belleville is located at 1000 St-Antoine West in the basement. I still have lots of information to give out so if you need any just hollar!