If you are looking for something new, Rincon is a great place. It has everything from a deli with wonderful cheeses, olives and other items you rarely see any where esle to a small mart where you can buy good quality olive oil and especially malta(goes good with rum). They do have a menu to order from with a few tables.
My wife and I love to go in for a quick grab n go lunch. We usually order the Empanadas and grab a couple of maltas to go. They staff is always very helpful and nice. Also in you are into soccer, its a great place to go on a weekend to have a sit down lunch and watch a game or two. Again, if you are looking for something new, check this place out. Oh yeah, try the chimmichurri, its awsome(you can buy a jar for like 5 bucks(well-worth it)