The Giggling Marlin, on Boulevard Marina at Calle Matamoros, blasts classic rock and dance hits, has frequent live music and puts on a saucy audience-participation show. The attraction here is a pulley device that dangles patrons upside down—rather like a captured fish—for a great photo op. There's also a restaurant on the premises that serves good Mexican and seafood dishes. To find it, look for the beer bottle-toting marlin atop the entrance.
Also high on the see-and-be-seen circuit is El Squid Roe, on Avenida Lázaro Cárdenas at Boulevard Marina (across from Plaza Bonita Mall). This three-level nightclub is loud, raucous and invariably packed. Be forewarned: It's the kind of place where waiters brandishing spray tanks of tequila move through crowds of people dancing on top of tables. An open-air dance floor is on the main level.
For a mellower evening, the Whale Watchers Bar in the Sandos Finisterra hotel, off Boulevard Marina heading out toward Land's End, is an ideal place to watch the sun slowly drop into the Pacific and enjoy a romantic evening.