1. Museum of Mathematics

Museum of Mathematics, an institution dedicated to the science of numbers and patterns, opened December 15. The 19,000-square-foot venue occupies two levels of a building at the north end of Madison Square Park and offers permanent exhibit space as well as classroom space available for private events.
Rendering: Courtesy of Museum of Mathematics
2. Skylight at Moynihan

Across from Penn Station, the Skylight Group operates Skylight at Moynihan Station, a suite of event spaces inside the century-old James A. Farley Post Office Building designed by McKim, Mead & White. Available are the mail sorting room, a 41,000-square-foot space with a black tiled floor and domed ceiling, and the 33,000-square-foot postal dock, an industrial steel and glass atrium with two drive-in access points.
Photo: Diana Bezanski
6. Harding's

Harding's, a restaurant serving American comfort food, opened at the Flatiron district in November. Available for buyouts, the restaurant can receive as many as 200 guests. Other spaces available for private events are the den and mezzanine, each accommodating 16 guests, while the dining room and cocktail lounge have a capacity of 80.
Photo: Michael Covino