To mark the success of the Hairywood installation by 6a Architects and Eley Kishimoto, the Architecture Foundation has announced that it is hosting a four-day table football tournament, supported by the AJ, at its gallery in Old Street, The Yard. Qualifying will be held 11-13 October with the final on 14 October. Teams of two are invited to test their skills on the 'mother of all football tables' - the world's most expensive, 'Opus', designed by Edinburgh-based Eleven Forty - for the chance to win a dinner for two at The Zetter and a year's subscription to the AJ. To enter the Clerkenwell Cup, email jade@architecture foundation. org. uk by 6pm on 10 October.