Calgary is known for its steak! Great steak and relatively speaking affordable compared to many other cities. If you're not a vegaterian, check out one of the many great steak houses, Cesar's Steakhouse downtown is a classic! It's old school, dark and well priced.
Calgary is not the most exciting city, rather bland to be honest, better known for its access to the outdoors. But i fyo have time to kill, checkout:
Stephen Ave. for walking street downtown - cafe's, restaurants, bars
17th Ave - for cafe's restaurants - main entartainment strip on weekends - Beano has great coffee
National/Craft on 10th Ave - for quick good bite and beer - german style beer halls
South end of Nose Hill Park off of 14th st. NW for quick view of Calgary skyline/downtown
Cheers,
Laurie