One of the splashiest soirées of the year, Parrish Art Museum’s Midsummer Party honors architect and artist Maya Lin as well as art collectors Louise and Leonard Riggio on July 13. Olivier Cheng, who catered the Met Gala, fuels the crowd for a spectacular live auction with items like Seabourn’s Mediterranean cruise. 279 Montauk Highway, Water Mill; 631.283.2118; parrishart.org