Socialite

A socialite is someone who participates in social activities and spends a significant amount of time entertaining and being entertained at fashionable events attended by others of similar standing. Socialites date to the 18th and 19th century. Most of the earliest socialites were wives or mistresses of royalty or nobility, but being a socialite was more a duty and a means of survival than a form of pleasure. Bashful queens were often forced to play gracious and wealthy hostess to people who despised them. Mistresses had to pay for their social reputation and had to use their social skills to obtain favor in the court and retain the interest of their lovers.

Examples
On the TV series Doctor Who, the parallel Earth counterpart to Jackie Tyler, also named Jackie Tyler, was a wealthy socialite who lived in a lavish mansion with her husband Pete Tyler and had wealthy friends, including the President of Great Britain.