I think it would be fun to play a little game everytime 4 or more people are waiting for an elevator in the elevator lobby. I would call it 'Musical Elevators.'
The object of the game is to pick the elevator that you think is going to open, and get in it first.
So, when you notice a group of people waiting quietly - you all of a sudden shout "PICK AN ELEVATOR!" and everyone will run to the elevator that they think is going to open first, and stand in front of the door.
The person who is standing in front of the elevator door that opens, wins!
Let's get playin!