Note that a game of "tripot", which my French dictionary doesn't define, plays a role in The Three Musketeers, and I seem to recall a duel in _TPG_ takes place in a ball court: "It was rather long in form, looking not unlike a shotball court save for the lack of goals and nets, and the existence of doors on either end." via booksearch. Sounds like a possible team sport (doubles tennis?) setting, esp. given it's big enough for an 8-person duel.