He looked up at the Club's chaotic Hopscotch Board, aglow with swapportunities, people wanting to rent a muscular body for a few days of hard labor, old men and women willing to pay for a week's vacation in a young and healthy physique, the usual sex ads searching for a two-night stand, once as a male, once as a female, or a blur of alternations before, during, and after.
Source: wiktionary