When I worked at a golf course, we used to have a mid day soccer match with the Mexicans. The mechanic had welded together some metal and made some nice little goals and we would shut both sides of the gates and play on the concrete. The Superinetendent and everyone else would play.
Another larger business/corperation that I worked for bought a ping pong table and we would have matches and tournements during lunch. Somebody was always at the table no matter what time of day.
These types of things come higly recommended by 'team building' and 'efficiency' experts.