Polyamorous NYC, on the occasion of its tenth anniversary, adds something special to its monthly meeting: a discussion of early-20th-century power couple writer Glenway Wescott and MoMA curator Monroe Wheeler and their 15-year relationship with photographer George Platt Lynes. On hand to lead the look back will be NYU professor Joe Salvatore, who wrote a play about the threesome, and Jerry Rosco, author of a Wescott biography.