The top level had smoked-gray caps on the hexagonal rooms. Up there golfers were pulling down simsense data directly from the ParVenue's golf course database. These did not need the challenge of weather and balls and perfect posture or square groove clubs. They played solely in their minds. For them the challenge was besting golf courses in places dreamed up by madmen arid physicists and modeled on the fastest decks available. They might play two holes on the front nine from the Sea of Tranquility, then shift to a course imagined for the blazing surface of Venus. Changes of gravity and density of atmosphere were their enemies.