Histoire du Tango attempts to convey the history and evolution of the tango in four movements: Bordel 1900, Café 1930, Nightclub 1960, and Concert d’aujourd’hui. Café 1930 is another age of the tango. People stopped dancing it as they did in 1900, preferring instead simply to listen to it. It became more musical, and more romantic. This tango has undergone total transformation: the movements are slower, with new and often melancholy harmonies. Tango orchestras come to consist of two violins, two concertinas, a piano, and a bass. The tango is sometimes sung as well.