As Paul has said, at the focus group day we played a version of the social media game originally developed with my colleague Drew Mackie, and enhanced by Beth Kanter and others.
The way it worked, to summarise, was:

1. We split into two groups, and each invented a scenario. As Paul reported, these were a small village fighting for sustainability, and a large network of parish and town councils. The instruction was, "make it challenging because the other group will be solving the problems and looking at how social media can help". (Of course the catch is that you inherit the other group's challenges!).