 It is also an individual dance.In the 1930s and 1940s, Afro-Cuban son groups such as Septeto Habanero, Trio Matamoros and Los Guaracheros de Oriente were played over Radio Congo Belge in Léopoldville (Kinshasa), gaining widespread popularity in the country during the following decades.Once local bands tried to emulate the sound of Cuban son (incorrectly referred to as "rumba" in Africa, despite being unrelated to Cuban rumba), their music became known as "soukous", a derivative of the French word "secouer" (literally, "to shake").