Are Rio Carnival clubs NSFW?

I remember growing up in Brazil and a lot of shenanigans would happen in the carnival clubs not sure if it was São Paulo or Rio maybe both, but it had an everything kind of goes vibe, is it still like that?

Or it’s just certain clubs? And how to find out what kind of club it is.

Also what kind of wardrobe to take to Carnival? I assumed cool and light clothes but should costumes be taken?

Are there specific themes days/nights?

Thanks for the help