If you like wine, this is a must visit. This is probably the coolest place in the Rio. They have an incredible selection of wines to choose from and you can walk around the whole place looking at what they have. There's lots of comfortable seating and tables, but I like to go to the tasting bar to sit.
I love to nibble on stuff when I drink wine and they have plenty of that here. Plus their wine flights make it really easy to try out different types of wine and not spend a lot of money buying bottles you might not like. I've tried several different types of wines I've never had before because they had flights to try them out. The service here is great and they are very knowledgeable about the wines. Even if you know nothing about wines, you can tell them what you like (e.g., fruity and sweet) and they can pick out some good wines to match what that. I went here years ago with some friends and did just that (when I knew nothing about wines). I would probably say that this is the place that turned on my fascination with wine.