snazfest

(noun) An upbeat, lively social gathering, often involving music.

People at these gatherings are often of the older, more "refined crowd". This festival can attribute its name to the adjective snazzy, or the noun snaz.

Tammy knew something wasn't right. Her attire certainly didn't allow her to mingle with the others at the snazfest.

My snazfest will be the talk of the town.

It was a snazfest until the cover band played Lenny Kravitz.