It's 5:30 in the morning. The two girls are gone from the balcony. The Attic and The Stacks are quiet. The cleaning crew has changed shifts. The Barn is still lit up and the undergrads in The Link, its floor littered with construction debris, are busy with their fourth and fifth paper towers. The War Room is still inhabited, but the energy is winding down (and trash talk winding up) as each person completes their assigned tasks starts asking what else needs to be done, or waiting for their teammates to finish.
Bed before dawn might just be possible.