A traditional, two-story restaurant, where kindly grandpa waiters serve authentic Mexican cuisine like caldo tlalpeño (chicken soup with vegetables and avocado), romeritos con torta de camaron (dried shrimp and rosemary patties in a rich mole sauce), huachinango (red snapper), and a mountain of simple, perfect guacamole. It's too classic to be trendy, and perfect because of it.