my thought was that basically thing like slip n slide flip cup or they arbitrarily make up games that usually have nonsense rules but admitting it's weird breaks the rules and is an automatic loss or during Christmas they play a hot potato type or game where they take turns unwrapping a mystery gift with oven mitts on while someone finishes a drink before the next lesson tries. BASICALLY REALLY DUMB AND SILLY THINGS THAT ARE ALSO CREATIVEIN AN UNPRODUCTIVE WAY?? or even maybe one of them enjoys making board games from scratch and forces everyone to play even though the rules are definitely wip