Visiting restaurants and strolling through gardens aren't unusual vacation activities, but imagine doing them under one-third the force of natural gravity. That's what Gene Meyers hopes his guests will do at his space hotel of the future: a revolving, Earth-orbiting space station shaped like a giant wheel. And in Meyers' vision, visitors will also share only-in-space experiences—like floating outside the station to the help the crew make repairs. Meyers, 62, an industrial engineer born and raised in Buffalo, NY, is the president and CEO of the West Covina, CA-based Space Island Group. He's among the handful of pioneers with major...