A small crowd enjoyed live music, fresh sushi, selfies and chit-chat with the tennis legend.
Alexandra Shipp and Anya Taylor-Joy also attended the event, held at a Belle Epoque cabaret restaurant in the tourist hot spot.
Pets and photography proved a draw for some fashionable New Yorkers.
Hailey Baldwin, Jemima Kirke and Andreea Diaconu join honorees Lorna Simpson, Joanne Leonhardt Cassullo and Beth Rudin DeWoody for the annual Whitney Museum Gala and Studio Party.
MSK brought a dose of spring florals to the Plaza Hotel on Tuesday night.
Knowles told the room how being bullied for wearing capri pants inspired her to be the artist she is today.
Emilia Clarke and Paul Bettany joined other heavy hitters from the cast of the highly anticipated movie at the SVA Theatre on Monday night.
Held at the Park Avenue Armory, the party drew guests such as LL Cool J, Paul Shaffer and Lea DeLaria.
The annual fund-raiser brought together Ashley Graham, Freida Pinto and Piper Perabo, among others, to support the organization.
The DUMBO House party honored Mike Amiri, Kristopher Brock and Laura Vassar of Brock Collection, Aurora James of Brother Vellies, Kerby Jean-Raymond of Pyer Moss and Sander Lak of Sies Marjan.