I am a huge Fuego fan, and have frequented Fuego Bistro in North Central Phoenix and Fuego Cantino in North West Phoenix. Fuego Cityscape is downstairs from the downtown Gold's Gym where me and my friend exercise (then go to Fuego for a glass of Zinfandel, which is excellent, and something delicious for dinner).
My favorite is the Chile Rellenos - honestly, the best I have ever had, although everything on their menu is delicious, with generous portions.
The manager is very friendly and helpful, and we always have a great time going to this location - which is getting to be about 2-3x per week!!
I definitely need to do more cardio...