Teotihuacan -- pronounced "that Mexican restaurant on Yuyuan Lu" -- is, depending on your point of view, either a very amateur attempt at some of the country's food, or a charmingly rustic neighborhood Mexican restaurant. There's a long list of fruity drinks, a few lesser-found tequilas, and a squirreled-away atmosphere. Burritos, nachos, and whatnot are cheap, cheap, cheap, in both senses of the word.