The first three hotels listed are the nearest to Warren Weaver Hall, the meeting venue.

Washington Square Hotel
103 Waverly Place
Phone: (212) 777-9515
Website

The Marlton Hotel
Address: 5 W 8th Street, New York, NY 10003
Phone: (212) 231-0100
Website

The Standard, East Village
Address: 25 Cooper Sq, New York, NY 10003
Phone: (212) 475-5700
Website

Holiday Inn Manhattan 6th Ave., Chelsea (least expensive)
Address: 125 W 26th St, New York, NY 10001
Phone: (212) 430-8500
Website