People tend to check in during these times:
Here for a meeting.
If you go during the weekend, the elevator doesn't go to street level. Instead, go to the parking garage behind the building/underneath the park. Go to the back and enter. Elevators work at that lvl.
The Fallout Shelter isn't on the 1st floor. The tunnels in the basement are designated to be a fallout shelter but there was never a WW3.
Fallout SHELTer on 1st floor. 720 capacity