The Infinite Monkey Cage at The Royal Institution. Entirely brilliant. Got a look round the museum first, complete with Tom Lehrer Elements game,some original Davy safety lamps and Michael Faraday's safety glasses.
The guest panellists were a game writer/researcher/creator called Dave Neale, comedian Jessia Fostekew and tiny mathematical brain box Marcus du Sautoy, with a discussion about games and gaming. All absolutely marvellous.