Social mixing or everyone in their place?

According to BBC, there’s social mixing on Rio beaches and there’s a place for everyone. Which is it, BBC? Not terribly interesting but…here’s a 5 min. spot on Rio’s top 3 (video was deleted from source).

I think the Brazilian documentary Faixa de Areia said it better. Mixing, while it can and does happen, is more of a myth when Rio beaches are concerned. The postos and barracas of Rio’s beaches are famous for being hang-outs of certain social types.

Does anyone have something to add or wish to refute my opinion? Comments welcomed…because it’s been a while since I’ve been on said beaches.