A person who is well known in fashionable society and is fond of social activities and entertainment
a socially prominent person
A socialite is a person who participates in social activities and spends a significant amount of time entertaining and being entertained. Socialites are usually wealthy. ...
a person (more often a woman) of social prominence, considered to be an influential figure; a person who goes to fashionable parties and is often written about in the newspapers, etc; a see also: useless