 Pine Mountain Club is unusual in that almost two-thirds of its 1,737 housing units (61.5 percent) were vacant when the census was taken in March 2000.They were, in fact, second homes, vacation retreats, or spaces held for rental to seasonal tourists — especially during the peak winter months.Owners lived in about eight of every 10 occupied units (84 percent), renters in the other two (16 percent).