San Telmo has to be my favorite Barrio in Buenos Aires. It reminds me of another favorite in S.F., the Mission district.
San Telmo's charm lies in its almost bohemian vibe, from the cobblestoned streets, to the fantastic street markets, to great restaurants and to the tango hotspot it's become.
Impromptu tango performances can break out anywhere, anytime. I think some hostels even have a schedule of when these performances can happen.
Watching this performance at a street corner, I was taken in by how these two dancers were oblivious to the crowds watching; they seemed completely lost in each other and the music. They imbibed the concept of being in the moment, a lesson that I took away from this experience.