Parts of the lower levels of the building are leased to the River Club, a private club that counts slightly more than half of the building's shareholders among its 900 or so members. As of 2013 the members, who included David H. Koch and Aerin Lauder, pay approximately $10,000 in annual membership fees. The club includes a restaurant, an indoor pool and tennis courts.
After several years of negotiations where the club attempted to negotiate the purchase of its space, the co-op board listed the club's space for sale as a private residence. Featuring approximately 62,000 square feet (5,800 m2), five floors and a private entrance, the board set an asking price of $130 million. If the asking price is met, it would be Manhattan's most expensive residence.