There is a night each year in Hong Kong when finance industry professionals take a break from trading securities—to trade blows. More than a dozen contenders (who work for banks, brokerages and hedge funds, among others) test their mettle in the boxing ring on "Hedge Fund Fight Nite," which includes a black-tie dinner for spectators. More than just a punch-up, the event aims to raise HK$1 million ($129,000) for charity. Here we give you a ringside seat to the action.