Curator Ulich Obrist is about to have a long day. “On Friday evening he will sit down with his friend and soul-mate, the Dutch architect (and designer of this year’s temporary pavilion at the Serpentine) Rem Koolhaas, and interview more than 60 artists, writers, academics and commentators for 24 hours, non-stop. Between them they will chew the ears off Brian Eno (the warm-up, at 6pm), Damien Hirst (vampiric, at 4am), and the likes of Doris Lessing, Richard Rogers, Ken Loach, Richard Hamilton and Gilbert & George (fresh as daisies at 7am).”