They would not have been notified. To pay attention to such details wastes too much of a president's time. We pay many other people to take care of it.
However, some presidents have tried to reduce the impact their movements have on others as a matter of style.
The forced the wedding to move only hours before it was scheduled.
The bride and groom had reserved the spot.
The president’s whims over ruled the schedule — just like a king.
Obama could have waited an hour to play his game.