The name salsa (mixture) has been described as a dance since the mid-1970s. The use of the term for the dance started in New York. It evolved from earlier Cuban dance forms such as Son, Son Montuno, Cha cha cha and Mambo which were popular in the Caribbean, Latin America and the Latino communities in New York since the 1940s. Salsa, like most music genres has gone through a lot of variation through the years and incorporated elements of Afro-Cuban and Afro-Caribbean dances such as Guaguanco and Pachanga. Different countries of the Caribbean and Latin America have distinct salsa styles of their own, such as Cuban, Colombian, Puerto Rican, L.A. and New York styles.
In many styles of salsa dancing, as a dancer shifts their weight by stepping, the upper body remains level and nearly unaffected by the weight changes. Weight shifts cause the hips to move. Arm and shoulder movements are also incorporated. The Cuban Casino style of salsa dancing involves significant movement above the waist, with up-and-down shoulder movements and shifting of the ribcage.
In some styles of salsa, such as the New York style, the dancers remain mostly in front of one another (switching places), while in Latin American styles, such as Cuban style, the dancers circle around each other, sometimes in 3 points. This circular style is inspired by Cuban Son, specifically to the beat of Son Montuno in the 1920s. However, as it is a popular music, it is open to improvisation and thus it is continuously evolving. Modern salsa styles are associated and named to the original geographic areas that developed them. There are often devotees of each of these styles outside of their home territory. Characteristics that may identify a style include: timing, basic steps, foot patterns, body movement, turns and figures, attitude, dance influences and the way that partners hold each other. The point in a musical bar music where a slightly larger step is taken (the break step) and the direction the step moves can often be used to identify a style.