If you're into music and local culture, you may want to check out Pedra do Sal. There's something different going on, depending on the day of the week, so you may want to ask around as to what kind of music you'll find on what night. If you're having trouble finding this locale, it's a couple of blocks from the better-known Museu do Amanhã. Mind you, this is at the base of a favela, so keep your street smarts about you, but you will find mind tourists and locals intermingling here. There's street food too, if you get hungry. But you might be too busy making friends and dancing to notice the hunger.