For your Class Reunion party theme, here is a game idea that can be altered to fit the Class Reunion party theme.
Check out Class Reunion
Party Games for more free party games. After year away, bring together old friends using old photos for your class reunion party.
GAME JOKE: Suggest 2 players doing the following thing. At first they kneel down and take their right legs with right hands (to raise them lightly from the floor). In their left hands they hold mugs. Fill one of the mugs with water. The task is to pour water from one mug to another, trying not to spill it. Then the players change their roles.