Anna 's world was Manhattan 's high life and nightlife : the trendy Upper East Side , where she again established a shaky live-in relationship with Bradshaw , whom she had followed to New York ; the chic '' Saturday Night Fever '' scene at Studio 54 , with its Andy Warhol-beautiful people set ; the downtown scene where other recent British expatriates -- journalists and fashion people -- lived in funky artists ' lofts , ran trendy new boutiques , and opened exclusive boites .