In a hidden enclave in Sag Harbor affectionately known as SANS--Sag Harbor Hills, Azurest, and Nineveh--there's a close-knit community of African American elites who escape the city and enjoy the beautiful warm weather and beaches at their vacation homes. Very few know about this part of the Hamptons on Long Island, and the residents like it that way. Against the odds, Olivia Jones has blazed her own enviable career path and built her name in the...