In a Central London hotel room I am communing with positive people. From the stage, a fitness expert leads us through an aerobic warm-up. Star jumps are tough on dodgy knees... Then it's down to the real business. Self-help through group ecstasy - the Billy Graham approach to success. Speakers arrive to a fanfare, extolling the virtues of self fulfilment and wealth. For Thatcher's generation, the one is unimaginable without the other. We're given free books. On how to become millionaires. A woman tells us she can turn us into butterflies. "Leave behind the corpses of your caterpillars. That is your past." I turn to my companion: "She means the chrysalis. The butterfly is the caterpillar." My mate nods distractedly. Inevitably, my mind wanders. Why should elephants have four knees? How long is a piece of string? Would the eccentric who turned down the Fields Medal also have refused a Gracie Fields medal? Finally, it's break time. And there's a competition! To win a whole weekend of self-improvement:-o Heading into the foyer, I celebrate the respite with apple and cucumber juice. My companion is of the happy-clappy persuasion. "I'd say," I venture, tentatively, "that there are better ways of spending a Wednesday night." She scans the room and nods. I have to run to keep up as she exits the building.