We ended up at Potenza after a server flagged us down, and since it was close to our hotel, we…read moredecided to give it a try. We're glad we did. The caipirinhas were the best we had in Rio, and we liked them so much that we came back about four times just for drinks.
We didn't try most of the food, though we did have French fries on our last night, so I can't really speak to the full menu. What stood out most was the atmosphere and the staff. Everyone was friendly and helpful, although one server was a bit persistent about asking for tips. That said, the amounts were small enough (in USD terms) that it didn't feel like a big issue.
The location is great, with both indoor and outdoor seating, and it worked perfectly for us since we were staying nearby. One interesting detail is that the drinks were larger during the day, served in plastic cups, and smaller at night, served in glasses.
If you're in the area and just looking for a good spot to grab drinks, it's definitely worth a stop.