This is a serious question...sort of.
I can't help but notice this post says "Balls" as in plural of ball. So do the signs at the old building and the new building.
When this establishment opened I assumed that the name was "Ball's Out" as in "the ball is out."
What sport requires more than one ball being played, and therefore, "out" during one particular play of a game? Petanque...Croquet...Cricket...Juggling?...I doubt we'll find any of these on the big screen TV's on Sunday afternoon.
Or was this just an unfortunate typo?