windows shmindows. arenas need to find a way to make the environment more foreboding. no natural light should ever reach the court. in fact, take it easy on the artificial light too. keep it light enough to still see, but not darker than we're used to.
and also, sound system wise, find a way to pump in a very low minor chord. so low that it's almost inaudible. so that one player might say to another "hey do you hear that?" and the other answers "hear what?"