Although this is more of a sports training facility (ie hockey, football, soccer, baseball, track etc) they also feature a very nice fitness area and it comes at a reasonable price. I have personally had a membership at this facility previously and quite enjoyed it.
NSD Sports and Fitness Club - Douglas Glen
116, 3442 118th Avenue SE
Calgary, AB T2Z 3X1
NSD Sports and Fitness Club - South Fish Creek
333 Shawville Blvd SE
Calgary, AB T2Y 4H3