Diners at some of the city's most popular restaurants had their credit card details stolen by waiters working for gangs, who targeted customers with American Express black cards, then spent millions of dollars on expensive clothes and vintage wine, it is alleged. The cards of wealthy customers at Smith & Wollensky, the Capital Grille and Wolfgang's Steakhouse restaurants were allegedly "skimmed" and used to buy Rolex watches, Jimmy Choo shoes and Chanel handbags. Almost 30 people have been charged with crimes, including racketeering, conspiracy and grand larceny, after the alleged fraud ring was broken by police in Manhattan. Seven waiters at the restaurants are alleged by prosecutors to have been recruited by Luis Damian "D.J." Jacas, the 41-year-old alleged ringleader, and equipped with card-copying devices. They were instructed to focus on customers with premium credit cards, including the American Express black card, so that expensive purchases would not trigger alerts to customers. "The thieves were very selective, waiting until they were handed cards with extremely high or unlimited credit," said Manhattan district attorney Cyrus Vance.