Play Some Tennis Day!
Just get out there and hit the ol' fuzzy yellow ball back and forth over the net until someone lands it outside the perimeter of the court. After every game, meet at the net and whomever won gets to tell a tale (3 hours max) of having loved and lost. If a story particuarly moves you and you don't think you can top it even if you did win the next game, just say "I'm outta here" and split. Then go out to the parking lot and key your opponent's car.
Happy Play Some Tennis Day!