How Big is Your Game Group?

I'll talk more about England tomorrow; today I'm thinking about games, and specifically about game scalability.

As I've mentioned before, I am a big raging game geek, who loves playing games of all kinds (mostly boardgames, but I'll play anything). I have a good group of friends who are also game players, and we get together as often as we can, but here's the catch–the size of the group is variable from day to day depending on who can come. Some of our favorite games play great with X number ...