The Bomas of Kenya is a cultural centre at Langata, near the main gate to Nairobi National Park. The talented resident artistes perform traditional dances and songs taken from the country's  various tribal groups, including Arab-influenced Swahili taarab music, Kalenjin warrior dances, Embu drumming and Kikuyu circumcision ceremonies. It's touristy, of course, but it's still a spectacular afternoon out.