When choosing a restaurant in Montreal or Quebec City, look for "Apportez-votre vin" (bring your own wine) signs. These establishments also permit diners to bring their own beer.
Speaking of beer, many bars offer a happy hour, usually from 5 p.m. to 8 or 9 p.m. Quebec provincial law forbids the advertising of these specials, so be sure to ask. The drinking age in Quebec is 18.