Dec 04, · The 15 Best Adult Christmas Party Games to Play All Holiday Season Long. Instead of going the ugly-sweater route, incorporate a costume theme into your Christmas party Author: Andra Chantim. How To Throw An Adult Christmas Party The holidays are a busy busy time for most people. If you're in the mood to have a party, make sure that it's an affair your friends and family will want to pencil into their calendars. Because they know you have good taste in drinks, appetizers, dinner, decorations, and dessert! pins.