try this game.
nobody can talk.
there are groups of 3 or 4 per table.. however you want to do it.
Create a simple card game.
Make a variation of the rules for each table.
Winners move up a table, losers move back a table.
At the end of the game you should have some frustrated people? You'll see who is more dominating (those who enforce there set of rules) and those are more passive. (not that there is anything wrong with either)
This shows how things in the workforce are often misconstrued and being able to see each others perspective is important.