The game they play is fundamentally the same as the schoolyard version: One player is "It" until he tags someone else. But men in their 40s can't easily chase each other around the playground, at least not without making people nervous, so this tag has a twist. There are no geographic restrictions and the game is live for the entire month of February. The last guy tagged stays "It" for the year.
That means players get tagged at work and in bed. They form alliances and fly around the country. Wives are enlisted as spies and assistants are ordered to bar players from the office.