The performance, when it finally kicks off, is akin to a mad jamming session with cacophonous contributions from the cheek-to-jowl audience and spontaneous outbreaks of dancing for those who can clear enough room to swing their elbows.

BBC: Seville��s legendary flamenco scene

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?