The undisputed winner of the weekend was Matt Gagnon’s Knit Fort, which was constructed on-site from bars of teak and rubber cording by the designer and his team over the course of a single afternoon. (André Balazs was rumored to have considered keeping the fort for his planned hotel renovation but ultimately declined.) For those who climbed the stairs from the hotel lobby, the fort emerged dramatically into view; for the rest, it beckoned invitingly from its perch on the patio’s raised platform, turning the terrace into something like summer camp.