“The center, 5,500 square feet of performance spaces and buildings along the Hudson River in upstate New York, had a soft opening this summer but is to officially open on Sept. 1 with [Alan] Cumming and [Savion] Glover, who will be joined by the jazz drummer Marcus Gilmore.” The highlight of the fall will be a new piece by Lucinda Childs, set to a score by Pulitzer winner David Lang.