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Back in Buenos Aires and a visit to a milonga - or tango dance hall.

I was completely surprised by the scene. I thought there'd be a lot of young people - there was no one under 40. I thought there'd be a lot of drinking - mostly water was being served. I thought it would be a sexy "pick-up" scene - nothing of the kind.

But this is just one milonga - there are many in Buenos Aires. They have similarities and differences - but they have one thing in common: they are dedicated to tango.