New York City "was extraordinarily full of vice. About 40,000 prostitutes were working in the city at the time, and there were many brothels, casinos and bookie joints. As for alcohol, clubs, and bars were supposed to close at one in the morning. But some couldn't remember being closed since the Civil War. All of these activities were illegal, so somebody had to pay off the police to make it happen."
(Check out the full interview here.)