On a recent day at LinkedIn’s headquarters, Chief Executive Jeff Weiner had just finished an all-important task: installing a “High-Five Zone” in front of his office.

The energetic executive fastened a giant square of red tape on the floor and a sign on the wall that instructs people how and when to give high fives. Anyone who walks through the square, which is nearly impossible to avoid, must give a high five to others nearby, the sign declares. More>>