Where can one feel more lonely than among people in the midst of a big city? How can one become less lonely than find oneself paired up with someone and keeping aloof from the world around? Though for a short while, but anyway give yourself up to an unknown partner granting him or her your warmth and, to the sounds of the bandoneon, surrender yourself to the dance tinged with passion and sadness. Tango is not in vain called sometimes "a five-minute-long love story"…