Shop ‘til you drop during Water Mill’s Ultimate Hamptons Girls Night Out on August 10. Ninety galleries are participating in Art Market Hamptons at Nova’s Ark Project & Sculpture Park from August 11-14. The Antigua Barbuda Hamptons Festival’s regatta, reception and fair at
John Steinbeck Waterfront Park on August 13 benefits i-tri nonprofit for middle-school girls. Head to Herrick Park for East Hampton Village Summer Festival from August 20-22. 71 Millstone Road, Water Mill, N.Y., 11976. 60 Millstone Road, Water Mill, N.Y., 11976. 5 Ferry Road, Sag Harbor, N.Y., 11963. 67 Newtown Lane, East Hampton, N.Y., 11937.