The Grey Eagle casino would be your closest option inside of Calgary. Always decent action there. They take a little more off the top of the small tourneys and pay more players. You should have no problem finding 1/2 or 2/5 here.
Deerfoot pays pretty top heavy for tourneys so it’s good to try and hit a big payday. They almost always have a table open for 1/2 and 2/5 can be found in the evenings.
Cash Casino I can’t really review as I haven’t played there in many years. Used to be the smallest, smelliest spot in town but I’ve heard they have renovated and that it’s not too bad now. They are the only other casino to offer regular tournaments.
Cowboys is always good for cash game action, no problem to find 1/2 or 2/5.
Elbow River has for a long time been the spot to go to play limit. I’ve never played there however.
Alternatively I’ll be hosting our regular 0.25/0.50 cash game on Thursday night, like a typical small stakes game it plays a LOT bigger. PM for details if you’re interested.