Historically, "Casino" traces its origin as a partner dance from Cuban "Son", Cha Cha Cha, Danzón and Guaracha. Traditionally, Casino is danced "a contratiempo". This means that, distinct from subsequent forms of salsa, no step is taken on the first and fifth beats in each clave pattern and the fourth and eighth beat are emphasized. In this way, rather than following a beat, the dancers themselves contribute in their movement, to the polyrythmic pattern of the music. At the same time, it is often danced "a tiempo", although both "on3" (originally) and "on1" (nowadays).