Well, keep in mind, even inside such a room social norms would rapidly evolve against letting things get too exciting, it’s just that there wouldn’t be any recourse to a larger legal system to resolve the finer points.
Maybe a big guy sits down in the corner with a tattoo across his bare chest saying “I am the lawgiver, if anyone in the room I watch is injured or killed without appropriate permission I will break the aggressor’s arms” and mostly follows through on that. When somebody kicks the lawgiver’s ass without taking over the job, everybody else votes with their feet.
Well, keep in mind, even inside such a room social norms would rapidly evolve against letting things get too exciting, it’s just that there wouldn’t be any recourse to a larger legal system to resolve the finer points.
Maybe a big guy sits down in the corner with a tattoo across his bare chest saying “I am the lawgiver, if anyone in the room I watch is injured or killed without appropriate permission I will break the aggressor’s arms” and mostly follows through on that. When somebody kicks the lawgiver’s ass without taking over the job, everybody else votes with their feet.