Spare Times for March 15-21

Museum of the City of New York: ‘Small & Shared = Green’ (Tuesday) A conversation about sustainable housing and government policy will feature Graham Hill, founder of treehugger.com, and Michael Colgrove, director of the New York City office of the New York State Energy Research and Development Authority. This talk, held in conjunction with the exhibition, “Making Room: New Models for Housing New Yorkers,” is sponsored by the Citizens Housing & Planning Council, the state Energy Research Authority and Life Edited. Reservations are required: (917) 492-3395. At 6:30 p.m., Fifth Avenue, at 103rd Street, mcny.org; $12, $8 for students and 65+, $6 for members.