By the early 1960s, a campaign to rid New York City of gay bars was in full effect by order of Mayor Robert F. Wagner, Jr., who was concerned about the image of the city in preparation for the 1964 World's Fair. The city revoked the liquor licenses of the bars, and undercover police officers worked to entrap as many homosexual men as possible. Entrapment usually consisted of an undercover officer who found a man in a bar or public park, engaged him in conversation; if the conversation headed toward the possibility that they might leave together—or the officer bought the man a drink—he was arrested for solicitation. One story in the "New York Post" described an arrest in a gym locker room, where the officer grabbed his crotch, moaning, and a man who asked him if he was all right was arrested. Few lawyers would defend cases as undesirable as these, and some of those lawyers kicked back their fees to the arresting officer.