Anybody worried they won't be spending the Millennium evening in a cool enough way could do worse than jet to Tokyo, where rock group L'Arc-en- Ciel will be performing to an audience of 60,000 in two halls (the cheap tickets see the show on a video monitor). Tokyo-based Anglo-German practice Klein Dytham Architecture has designed the set - a time tunnel with a heavy clock theme. It will be coolly minimal until midnight, when it becomes an ott extravaganza. The high point of the evening comes when the pa system is switched off, and each audience member gets a call on their own special mobile phone from a member of the band. After which, they can spill out to enjoy the other delights of the O'Diaba area, including what is currently the world's largest ferris wheel - until, of course, the London Eye opens. Mark Dytham tells me of another coup for the practice: it has gone into beer production with its own micro- brewery in the city.