Sustainer Membership at the Museum of the City of New York and a copy of New York 400: A Visual History of America's Greatest City . Benefits of the sustainer membership include two membership cards offering free unlimited admission for two people, discounts on tours and public programs, a subscription to the bimonthly program calendar, 15% discount in the museum shop and cafe, an invitation to the annual Members' Appreciation Night, invitations to al exhibition opening receptions and an invitation to the annual Spring Lecture Symposium Luncheon.