Open House New York’s annual weekend of free tours is this weekend, on October 9 & 10. You may have waited too long to book many of these tours, but there are still some with space available on Saturday and Sunday. Open House New York was started in 2001 by architect Scott Lauer, and has quickly become America’s largest architecture and design event. It has opened spaces like the magnificent Jefferson Market Library tower to public tours (a full listing may be viewed on the OHNY website). And if you want to help this fantastic organization, come to their annual Weekend Launch Party! This year it will be on the top floor penthouse of the I.M. Pei-designed Centurion apartment tower in midtown Manhattan. The tickets are only $50, and can be purchased online or at the door. See you there!