El Caballito is a great option when they have Tacos Tuesday (yes, on Tuesdays!) with live music and discounted prices for tacos!
The restaurant is open until 1 am and is located, somewhat oddly, in the downtown area. A rational starting point of your dining experience is with the guacamole and taro chips. The chips are excellent and make up for the relatively mediocre guacamole. But the combination is sure to be a hit. The selection of tacos is great ... I quite like their poblano and mushroom ones. They also have a vegetarian quesadilla that comes in pairs, and is quite compact and light. If you are into drinks, they have a selection of margaritas, tequilas and wines that is sure to please.
I will come to El Caballito from time to time. It is quite a departure from the formal setting upstairs at Los Colibris, a sister concern that is better suited for upscale Mexican fare.