UJA-Federation of New York a communal planning and philanthropy for the jewish community of New York City provides a comfortable and private space for nursing moms. 

This nursing mothers room can be used by visiting moms who need a moment to breastfeed their babies or express milk with their breast pumps.

Mom Tamar Snyder wrote:
Props to UJA-Federation of New York, which has a lactation room on the fourth floor that has proven convenient when attending conferences and meetings in the 59th Street building