A socialite is defined at Vocabulary.com as
someone who spends a lot of time in fashionable social circles. A socialite gets invited to all the best parties and says yes to all of them.
Although the word's connotation may be neutral when it simply refers to a woman, often possessed of independent wealth, who is prominent in society, it may be somewhat more pointed.
Consider the portrait of a socialite in Ellen Kay's poem, "Pathedy of Manners":
...afraid to wonder what she might have known,
With all that wealth and mind had offered her,
She shuns conviction, choosing to infer
Tenets of every mind except her own.
A hundred people call, though not one friend,
To parry a hundred doubts with nimble talk.
Her meanings lost in manners, she will walk
Alone in brilliant circles to the end.