Salsa originated in Cuba and the surrounding Caribbean islands, with roots in Afro-Cuban Rumba dance in the 1920s. Standing on the edge of dance floor, he watches couples as they swing, dip and step to the beat. "I just love seeing. Though barely a sliver on the map, the island of Cuba holds more musical talent. Consider a passage in which five percussionists offered classic rumba–the fast tempo merger of…