There are few rules and the tequila flows like lava. This is pretty much the case anywhere in Mexico, and especially so in Mazatlan. Dress codes are casual, though for the dance clubs it's advisable for guys to wear a collared shirt with the shorts and sandals. Clubs are quiet until midnight and are open until 4 a.m. The drinking age is 18, though inspection of age identification is spotty at best.
Weekends are the most crowded.
Sunday evenings and early weekdays can be slow. PubClubbing Going full-tilt in Mexico is as easy as showing up at the bar. It would be easy to settle into this routine, and anyone who did so would be quite happy with Mazatlan's nightlife. Joe's Oyster Bar is the place for late afternoons and pre-clubbing, and Bora Bora is the wild and uninhibited dance club for which Mexico is so famous for having in every major destination. Changes of cantina-style pace are found at Jungle Juice and Gringo Lingo.