It was on the street behind our hotel and we ducked in one afternoon for a beer and a sandwich - very good. They have Quilmes Stout (a different take on stout beer that I really enjoy - it's sweet) and nice place to sit outside. I would recommend if you're staying downtown.
Owe is the exact place to go if you want to share a beer with the guys. Lots of different craft beers (the most popular types, obviously, wheat, stout, etc), most of which are very good; and they also serve german-like food, pizzas, some charcuterie and american food (burgers, nachos, etc). The place is very cosy, and the waiters are quite nice.Good place to go if you are willing for a cold beer
Restaurante del hotel El Olivo. Es pequeño y tiene pocas mesas. Ahora abren al mediodía. Muy buen menú ejecutivo y tienen tambien menú de carta. Precios normales. Le falta un poquito de onda a la ambientación pero se compensa con la excelente atención.