Walk past the Sunday night milonga in San Telmo's Plaza Dorrego and you will see eager young travellers putting their first tango lessons to the test, dancing cheek-to-cheek with distinguished-looking partners three times their age.
BBC: Anyone for tango?
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On Sunday afternoons at Plaza Dorrego in the San Telmo Antiques flea market, a local legend and resident, El Indio, does a demonstration of tango accompanied by a bit of history (in Spanish).