Mexico City doesn’t go to sleep when the club closes. It just changes locations. Somewhere around 2 a.m., DJs begin playing their final tracks, bartenders start closing tabs, and crowds spill onto the streets of Roma Norte, Condesa and Juárez. But for plenty of people, the night is nowhere near finished. The next stop might not have a guest list, a dress code or bottle service. It might be a taco stand glowing beneath fluorescent lights, a small bar where nobody seems ready t