At a recent, exhilarating and triumphant concert in Memphis by the Afrobeat star Seun Kuti, son of the late Fela and leader of his father’s band Egypt 80, the concert organizers felt compelled to apologize for his politics. Though “IMF,” a standout song from Kuti’s latest album, A Long Way to the Beginning, stands for “International motherfuckers,” it was his good-natured, often funny, but sincere bantering between songs, mostly about poverty and corruption and a few times laced with a swear word or two, which offended the venue management.