If you're looking for a relaxed environment with great mexican food, then you better get yourself to Los Habaneros! A favorite of my boyfriend and his (and now our) roommates, I've started to become a fan myself.
Hidden in a tiny strip mall, once you can find the place you won't be disappointed. The menu is extensive, so there is a little something for everyone, and everything I've ever tried has been great. And definitely don't skip out on the margaritas! Very good and you get a lot for your money, which can also be said about the food.
Be sure to check the website for specials - a favorite is Tuesday's buy one marg get one half off.
Service is great, atmosphere is fun, and add the excellent food and drinks and this is a combination that can't go wrong.