Browse Southampton Art & Antique Festival (Agawam Park: July 2-3), and the Hampton Flea (Southampton History Museum: July 3, August 7, September 11, and American Legion Post 419: July 10, August 14). On July 9, God’s Love We Deliver board member Aerin Lauder opens her home for Midsummer Night Drinks, and Samuel Waxman Cancer Research Foundation hosts its 18th annual Hamptons Happening. 51 Pond Lane, Southampton, N.Y. 11968. 17 Meeting House Lane, Southampton, N.Y., 11968; 15 Montauk Highway, Amagansett, N.Y., 11930. 900 Lumber Lane, Bridgehampton, N.Y. 11932.