The tango dance is a duo. The basic dance steps include walking, turning and stopping. Tango dancers step in synchronized movements. There are many ways to dance the tango. Some tango dancers hold their partner close; others dance in an open frame. Some dance with an upright posture; others dance in a less rigid stance. Some tango dancers step to tango music; others step to modern song. Tango dance steps vary with the tune. The tango dance originated in the brothels of Buenos Aires in the early 1900s. It has changed a great deal over the years.