...negotiated hard:

to get the best possible result.

A skeleton, a thermos flask filled with mulled wine, a magnetic parrot.

Trash secret Santa.
Everyone brings 'a present' aka trash from home you want to get rid of, wrapped in newspaper, all go in the middle. Now rolling the dices in rounds, every 6 takes a present, play until everyone has a present. Then play another half an hour, every 2 makes the present go to the left, every 5 makes the presents go to the right, every 6 must swap the present with another present of choice.
Then unwrapping one after the other, screaming, laughing, swearing allowed, aftwer the first shock the phase of heavy negotiations begins...

The ones pain, the other ones pleasure...