I thought up this idea for a game to introduce OWS-type consensus decision-making signals, to practice their use, and to spark discussion about the basics of consensus and some difficulties in consensus decision-making.
Circle game, whole group.
Joker first reminds people of the game Simon Says, leading a quick refresher round of the game. In this game, though, Simon doesn't get to give commands, s/he can only make proposals.
So, for example, the joker says, "Simon proposes we touch our noses."
Then, all the players "twinkle":
a) up to show their support