My favorite place to have a coffee in Calgary. working right across the street, I stop in almost daily. They have a great drip roast that changes every couple weeks and have very solid coffee drinks as well. The traditional capp is really great and is how a cappuccino should be done.
Food options are not too vast, but are reliable. They have a wicked Thai Chicken Soup and a few sandwich/wrap options. The cheese biscuits are awesome (especially if they throw it on the panini grill for you!).
There is also a well curated wine and beer selection to indulge in for an afternoon/early evening drink.
If you haven't been yet, Rosso is the strongest coffee company in Calgary and is worth a try.