As Jamaican ska gave way to the slower styles of rocksteady and the more politicised reggae, British African-Caribbean people followed suit. Sound systems to rival those in Jamaica sprung up throughout communities, and "Blues parties" - parties in private houses, where one paid at the door - became an institution. The arrival of Bob Marley to London in 1971 helped spawn a Black British music industry based on reggae. His association with the Rastafarian movement influenced waves of young people, reared in Britain, to discover their Caribbean roots. British Barbadian Dennis Bovell became Britain's prominent reggae band leader and producer, working with many international reggae stars, and introducing a reggae flavour to the British pop charts with non-reggae acts such as: Dexys Midnight Runners and Bananarama. Bovell also worked extensively with London-based dub poet Linton Kwesi Johnson.