After the first day of an offsite, mix it up a little by having this poster waiting at the door for participants to see the next day as they arrive. Finding a new seat forms new relationships as participants sit next to new people. You can also use finding a new seat as a metaphor for appreciating others' perspectives.
A variation on this is to also change the room layout.
Be sensitive to the amount of materials you're asking participants to move.
Gain a New Perspective, Find a New Seat comes from Elise Yanker.