Each person in the group has to think of something important about how to work in groups, or things to avoid. We have a scribe who writes it on the wall. Nobody can repeat anything that has already been said. DNC elaborates on each suggestion with an anecdote or illustration or clarification. It's a lot of fun, and it keeps people friendly right through the semester.
DNC usually starts off the game by offering one suggestion which is "Remember, this is Business" i.e. we must always remember we have a job to do, and not let personal differences stop us achieving that.
He rounded off the session with a final one, the friendly converse of the first one, that "we shouldn't take ourselves too seriously because we are here to learn and have fun." !
Thanks to Seetal for writing them on the wall.