We admire achievers, from James Watt to Mandela, Marie Curie to Emmeline Pankhurst. Yet many spend their lives waiting for weekends and holidays. And does not play, both as sex, drugs and rock and roll, and as creative and physical endeavour provide us with the most memorable events in life? In this episode of Philosophy for our Times, Helen Lederer, Julian Baggini and Susan Neiman debate what it's all for.