Rua Haddock Lobo, 354 - (11) 3214-3347
www.bellapaulista.com
If you play cards, this is a "joker" when I think of food in Sao Paulo.
It's open 24x7 and there's always all different kinds of food.
There's a soup buffet in case its a bit cold, there's a brunch at around normal hours, there's also a bakery, they also sell wines, cheese and some imported stuff.
My favorite besides the soup would probably be the ice cream and the brownie.
It doesnt matter what time it is, nor if its business people or if you are just getting out of the club, there's always something good to eat!
Sandwiches w Ciabatta are really good as well.