Salsa music Caribbean, and New York cultures and musics, with no mention of Cuba. In one scene, the Afro-Cuban folkloric genres of batá and rumba are shown being performed in Puerto Rico, implying that they originated there. In advancing the concept of salsa as a musical "sauce", containing many different ingredients from various cultures mixed together, some point to the occasional use of non-Cuban forms in salsa, such as the Puerto Rican bomba. The percentage of salsa compositions based in non-Cuban genres is low though, and despite an openness to experimentation and a willingness to absorb non-Cuban influences, - such as Jazz
Dance in Cuba repertoires. Some of the bolero's leading composers have come from nearby countries, most especially the prolific Puerto Rican composer Rafael Hernández; another example is Mexico's Agustín Lara. Some Cuban composers of the bolero are listed under Trova. Salsa dancing originated in New York in the mid-1970s. It evolved from earlier dance forms such as Cha cha cha and Mambo which were popular in New York, and incorporated elements of Swing dancing and Hustle, as well as elements of Afro-Cuban and Afro-Caribbean dances such as Guaguanco and Pachanga. In many styles of salsa dancing, as a dancer changes weight by stepping,