The whole world is spinning. Exercisers spin; so do politicians, DJs, "Wheel of Fortune" contestants. There is in the earthly soul a desire to rotate on one's axis. And to have things revolve around us. Jugglers understand this longing. So do the Harlem Globetrotters, the tuxedoed entertainers who keep twirling plates balanced on sticks, and now a new breed of people at the center of their own universes -- the sign spinners.
Maybe you've seen them at a busy intersection in Bethesda or Arlington, holding and spinning signs for some retail store or condo development.