or af·ter·par·ty or af·ter par·ty
noun, plural af·ter-par·ties.
Examples from the Web for after-party
An after-party was held at the Diamond Horseshoe nightclub at the Paramount Hotel on West 46th Street.
It was September 1996 at an MTV Video Music Awards after-party in New York.
He threw the after-party at his then-home with his wife, the national security commentator Elise Jordan.
On the opposite end of the spectrum, hotels pitch in-room cocktails as pre-party (or after-party) fuel.Hotels Lure High-End Clients With In-Room Cocktail Service|Elyse Moody|July 15, 2012|DAILY BEAST
The Royalist can't help but wonder where the after-party is going to be.