On a recent Saturday when I had nothing to do, I put out a call to see who was around for a last-minute dinner party. Result: nine random guests including several journalists, an art critic, one poet, my 22-year-old cousin from Nashville and two game designers. As will happen when game designers are in the room, we ended up playing. I’ve mentioned Colleen Macklin and Eric Zimmerman on these pages before. Their work continues to inspire me, and I need to tell you about this game they brought over to my house. It’s called The Metagame, and it comes from …