InterContinental New York Barclay as Coronet Hotel
Finch and Reese get jobs at the hotel so they can investigate their most recent number.
Source: Person of Interest — Wikia
“Booked Solid” Filming Locations
John and Harold take jobs at an upscale hotel to protect a maid in danger while Carter is interviewed for the FBI and Hersh narrows in on Reese.
Person of Interest episode “Booked Solid” was filmed in New York in the United States of America.
St. Bartholomew's Church as 31st Precinct
Hersh breaks into a police car from in front of the 31st precinct to get access to the police database.
Source: Person of Interest — Wikia