Estrada is a nice campus area Mexican restaurant with patio seating so you can drink your Dos Equis and eat your enchiladas. Patio entertainment for us included sparrows sneaking chips out of the stacks of chip baskets every time the waitress was not near her station.
While not the most ""authentic"" Mexcican food you can find in the city, I found the chicken and beef enchiladas to have a nice kick. The salsa was also good, with lots of tomatoes and onions. This is definitely a restaurant worth trying if you are in the campus area.