According to New York Magazine, the Wall Street clubs that cater to corporate types are still packed, but a Columbia sociologist believes that in times of cash crisis, strip clubs will become emptier while prostitutes will remain as busy as ever. The credit crunch has already raised the divorce rate among the superwealthy in the US - but for lots of my friends, the volatility of the market has done the opposite, and caused a mini-epidemic of casual sex as they tire of worrying about cold, hard cash and cozy up to the nearest warm body instead.