Mats Wilander, the former No. 1 tennis player in the world, won seven Grand Slam titles in a Hall of Fame career. If you would like to take a tennis lesson from him, please call 787-GET-GAME and he'll drive to your local club in his Winnebago.

"At first I thought it was a joke," said Andrew White, a bond trader at III Offshore Advisors who plays at Bear Lakes Country Club in West Palm Beach, Fla., where Wilander has visited the last two years. "Then he showed up."

Tennis...