Wet Willies
One of the best bars on the island. At the end of a pier just north of downtown San Pedro.
The water in San Pedro is safe to drink, but on the mainland and smaller islands, use bottled water to be safe.
Many piers have bars where you might order a rum drink with a parasol in it. For a nice laid back bar on the beach try BC's. The Tacklebox makes a mean mojito.
The local beer is Belikin, which can be bought everywhere.
Rojo Lounge
About 4 miles North of the Cut
Wonderful, relaxed upscale restaurant directly on the beach with it's own pool.