On August 19: Oscar winner Ariana DeBose (West Side Story) performs at Southampton Arts Center’s Summerfest; and ARF Hamptons hosts its Bow Wow Meow Ball in its new William P. Rayner Training Center for the first time with the Peter Duchin Orchestra and parade of animals. Ellen Hermanson Foundation’s Summer Gala takes place at the Bridgehampton Tennis and Surf Club on August 26. 25 Jobs Lane, Southampton, N.Y., 11968. 124 Daniels Hole Road, East Hampton, N.Y., 11937. 231 Midocean Drive, Bridgehampton, N.Y., 11932.
