Tenderloin, Manhattan
Coordinates: 40°44′56″N 73°59′17″W / 40.749°N 73.988°W
The Tenderloin was the name given to an entertainment and red-light district in the heart of the New York City borough of Manhattan during the late 19th and early 20th centuries.
The area originally ran from 24th Street to 42nd Street and from Fifth Avenue to Seventh Avenue. By the turn of the 20th century, it had expanded northward to 57th or 62nd Street and west to Eighth Avenue, encompassing parts of what is now the Flatiron District, NoMad, Chelsea, Hell's Kitchen, the Garment District and the Theater District.
New York Police Department Captain Alexander S. "Clubber" Williams gave the area its nickname in 1876, when he was transferred to a police precinct in the heart of this district. Referring to the increased number of bribes he would receive for police protection of both legitimate and illegitimate businesses there – especially the many brothels – Williams said, "I've been having chuck steak ever since I've been on the force, and now I'm going to have a bit of tenderloin."
...
Wikipedia