Cuba
Head to the Casa Musica to dance with the locals on the square in front of the church and drink mojito's till you drop. After this, head to the caves, where you will find the most unlikely nightclub in the world, and you can bop to merengue between the stalagtites in an enormous underground cavern.
Alternatively if you are fluent in Spanish and not afraid to stick out a mile - mix it up with the youth of the town in Chocolat y Fresca - another unlikely venue that bears witness to some truly astonishing dancing on a Friday night.
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