People tend to check in during these times:
Right next to the den where you can get some good breakfast/lunch. Then walk across the breezeway to the fourth floor and if you go down a floor there is a nice little study room on the 3rd floor.
It's better and faster to take the stairs. If you wait for the elevator you'll wait for at least 5 min then keep an eye on the floor! So slow!
Where I spend all of my time.
You can skip the hill and just take the elevator up to the 4rth floor