Rio [1]’s commercial hub has scads of eating options, especially during the weekdays, when downtown bustles with activity. You’ll find a wide range of choices: from speedy self-service buffets and bars serving prato feitos or “PFs”—simple home-cooked specials of the day, usually consisting of the basic meat, beans, rice triumvirate—to contemporary bistros (many located within the area’s museums and cultural centers) and an increasing number of top-end gourmet restaurants.
Links:
[1] http://www.moon.com/destinations/brazil/rio-de-janeiro/rio-de-janeiro-city