IF, THEN, AND.
Everyone at the party writes a few complete sentences, each sentence with one If, one Then, and one And.
All the Ifs get collected and mixed up, same with all the Thens, and all the Ands, keeping the ifs thens and ands separate, and you end up with three piles. Better if you mark the wrong side of the paper with if then and and, to identify it easily from the wrong side. Someone chooses one if, one then and one and, and you go around the table reading the new sentence. Some are really funny.
For instance:
If I was a millionaire
Then my mother wouldnt talk to me any more
And Id eat steak for breakfast…
Sorry, I couldnt remember the really funny ones. The above was for example.