socialite
n.a person who spends a lot of time at social events and parties. You usually use this word for someone who is very famous or wealthy and attends many high-end gatherings.
n.a person who is frequently present at social events, particularly those involving high society or the elite. Often carries a connotation of being a celebrity or having significant wealth.
“The socialite was seen at every major party last night.”
“As a prominent socialite, she has a large following on social media and attends many charity galas.”
“While some view the socialite as a mere spectator of high society, others argue that such individuals play a vital role in maintaining the cultural and economic networks of the elite.”
From social (“pertaining to high society”) + -ite, perhaps as a play on social light, in imitation of words in -ite.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.