Pundits can talk all they like about 60 being the new 50, and 40 the new 30, but you don't need magazine psychology to work out exactly where you are in the numbers game. If the thought of the latest cool nightclub with up to 2,000 young people in it has you reaching for a Ventolin inhaler, don't fight it, embrace it. You don't have to do anything you don't want to any more.