Argentinian tango emerged in the 1870s among a melting pot of immigrants around the docks of Buenos Aires. Soon the music and style of dance filled taverns before reaching local theaters. In the early 20th century, tango spread across Europe and America. Like all crazes, the tango lost its popularity. Yet it still flourishes in Buenos Aires and especially along Caminito Street in La Boca. Each bar and restaurant features its own pair of dancers. Even the tourists get into the act.