ENTRY to the One For One nightclub on Park Lane is by invitation only, so what goes on tour in the darkened corners of the Mayfair den usually stays on tour. Except, owing to the fondness of its jetset members for spending large amounts of money on top-end champagne, reports of high-rolling activity occasionally filter out. Like this example set by four “international businessmen” on Saturday, who satisfied their raging thirst with four bottles of Brut Gold Armand de Brignac champagne, two of rosé and one six-litre Methuselah at a weighty £25,000. Autonomy CEO Mike Lynch was not out partying though, following Hewlett Packard’s £6.7bn swoop on his software firm – The Capitalist hears he has been far too busy to celebrate his forthcoming £505m payday.