Habitues of the New York architecture scene have long looked forward to Open House New York, the annual weekend in October when the doors to New York’s secret spaces are thrown open in a citywide celebration of architecture and design. Well, now it’s time to return the favor. The 8th Annual OHNY Weekend is seeking volunteers to help at this year’s upcoming event on October 9 and 10. Volunteers would assist any one of the weekend’s many programs, which include organized tours of spaces open to the public for the weekend, as well as site-specific dance and music performances and dialogues with architects, designers, and scholars. In years past, venues have included the High Bridge Water Tower, the Grand Lodge of Masons on 23rd Street, and the Eldridge Street Synagogue, along with architects’ offices, residential interiors, and sundry other venues across the five boroughs. The volunteer shifts will be approximately four hours long, but depend upon the assigned site’s open house schedule, and attendance at one of two training sessions (offered on Sept. 21 and 25) is required.