Pilón is a Cuban dance rhythm from the early 1960s, created by composer Enrique Bonne and singer Pacho Alonso, both from Santiago de Cuba. The name comes from the pilón, the hollowed log in which peasants pounded coffee.
According to EcuRed, Bonne explored the possibilities of percussion and in 1961 founded the group Tambores de Oriente, with congas, bocú, catá, tumbadoras, requintos, bells, chekerés and the corneta china. He proposed the new rhythm, which had forerunners in the Oriente barrel organ, to his childhood friend Pacho Alonso. The first recording in the pilón rhythm was Bonne's Baila José Ramón (1964); with Rico pilón and El upa upa by Pacho Alonso and his group Los Bocucos it broke through, and it became popular at the 1965 Havana carnival.
According to EcuRed there is not one stroke but several rhythmic elements at play:
According to Wikipedia, the rhythm later influenced many Cuban and Latin jazz musicians.
The arms imitate pounding coffee. For the basic step, see the Pilón dance page. According to EcuRed, pilón was very popular for a while, but did not become a folkloric dance.