There's a guard in the lobby at the front desk. A lot of monitors and security guards on every floor.
5 seconds sound clip from The Master (1984) - Max (S1E1) sitcom.
You can hear this line at 00:37:09.650 in the Blu-ray version of the TV Series.
Quote context
[...]
- I like a man who keeps his head. Don't you?
- The boss is on the top floor. How do we get up there?
- I would suggest you use the elevator.
- How are you going to get up there?
- Max Keller to see Mr. Christiansen.
- Now you should have gone down like a sack of flour.
- Sometimes an old-fashioned right-hand cross comes in handy.
[...]