Can't wait to do this from a referee standing.
I think there needs to be more for spectators, though.
Like when a Quarter ends, start playing music temporarily.
For a half time show, have a dunk/shot contest for a few spectators, winner gets VIP seating or something.
When a Time out is called, play some music.
It's unbelievably quiet the entire time TBH, but I'm not sure how to fix that.