I'll be spending a week doing very little other than relaxing on the beach in South Beach. This is a lazy trip and I do not want to travel outside of South Beach. I am looking for very casual food options. I prefer non-fancy and non-fussy food and love seafood and anything latin. Eating outside is a plus. Cheaper the better. Chains are a nope. What can you recommend? Walking distance from the beach is a huge plus.