The exact timeline of when Mexico City Restaurant and Lounge debuted is a bit murky, but there are few things that are clear: It dates back to when Larimer Street was still skid row and Coors Field was decades from existing; it’s still family-run; and it’s known for a Den-Mex original — the fried taco. The restaurant was started by Willie and Ester Garcia sometime in the late ’60s or early ’70s…