After becoming a Mexican resto institution and favorite in NYC, Mercadito is now in Chi town and just as good. They're serving up creative, updated tacos -- pastor with grilled pineapple, chipotle-glazed pork belly -- along with some interesting guacamole alternatives, including one with mango. Best of all may be their nearly 100 tequila options, which, rest assured, go towards some crazy good margaritas.