sentences:  During slavery, and after it was abolished, rumba served as a social outlet for oppressed slaves and the underclass which was typically danced in the streets or backyards in urban areas.Rumba is believed to have grown out of the social circumstances of Havana because it "was the center for large numbers of enslaved Africans by the end of the eighteenth century.Rebellion was difficult and dangerous, but protest in a disguised form was often expressed in recreational music and dance."