Every craft beer lover knows of Dieu du Ciel, so for me, my visit to Montreal is not complete without a pilgrimage here. Dieu du Ciel and Unibroue are the best known breweries from Montreal, but Unibroue is not open for visits.
They have a long list of beers on tap on a large chalkboard. There is not a lot of info though, so if you are not familiar with their beer, it may be a challenge to order, even if the waitstaff is patient enough to answer your questions. Thankfully they do offer the beer by small taster glasses, and I can order any number I want, so I sort of make my own flight.
They have an outdoor patio, great to sit out there with a beer and enjoy a lovely evening.