Here in Calgary, the Big Rock ales are very good. Most of the common imports are here, inc. Guiness, but I prefer the locals. Just as good and often better. Some of the microbreweries are OK.
Of course, all of the dishwater is here; Kokanee is one of the local favorites. Coors is my pick for a light soft drink on a hot day and I want to avoid the high percentage stuff, echoing Ron and Gnu.
An excellent dark beer is Dos XX (pronounced dose eckees) from Mexico; it is sold widely but often sold out in Canada but in Hawai'i on vacation I always picked it up with my breakfast makin's at the grocery and liquor vendors. Another dark beer in Mexico is Modelo, but the vendor always gives you a funny look because it is drunk, I think, mostly by invalids and gays. For something potent in a small bottle, try Cuauhtemoc. A few bottles of that and your head will buzz for a week.