The FabFour #1 was an awesome place in Montreal. It is located about a 10 minute cab ride from Old Montreal, but still surrounded by shops in a lively area.
The place itself is spacious, beautifully decorated, and very well stocked. For a large group, this space is ideal. The only downside is that it is quite loud with people going in and out of other units in the building, although this can't be controlled by the renter. Overall, I would highly recommend staying here!