Great mexican food and seafood places all over. One of my favorite places to eat is the Frech Quarter. They have canadian beef, so it is safe to order some meat. Good fresh catch specials everyday.
Other than that, not really any tequila bars worth noting. Go to Pipo the first day and ask them to photocopy their tequila list without pricing, as they don't want that info out on the street. And you can buy a bottle or 2 to sip on while you're there.
I bought a bottle of Gran Centenario Repo 1L for $18 and a bottle of Clase Azul repo for $50. Palomas and snifters all week.