Because sometimes, you just can't get rid of them.
Involve Them in the Party Offer Them a Keurk Serving Them a DrinkJust make them think it's their idea.
Get them involved in the party planning, and they'll be too busy to notice their departure.
Ask for Their OpinionA small token of your appreciation for their uninvited presence.
Might just keep them happy enough to leave on their own.
Offer Them a Tennis BallJust enough to keep them occupied, but not enough to keep them there.
Might just make them forget why they came in the first place.
Serving Them a Fruit Juice