I'm not a manager, but I am directly responsible for 21 computer labs at my university. My process is something like this:
1. Walk through door; hold breath to see if creepy-as-hell boss is waiting at desk (he is 50% of the time). Breath sigh of relief if he isn't, curse life if he is.
2. Check email.
3. Check for fires in ticket queue.
4. Check for fires in printer status program.
5a. If creepy-as-hell boss is present, ask if there's anything he needs me to do, suggest over following 15 minutes of awkward silence that we get to work instead of him staring at me (in nice words)
5b. If creepy-as-hell boss not present, go down the hall and up the stairs to coffee.
6. Get down to business putting out fires around campus, if creepy-as-hell boss not present take quickest path away from the building. When fires are extinguished, find a remote lab to hide in and check forums.
All of this can take 10 minutes if I'm alone, or up to 45 minutes if creepy-as-hell boss is with me, depending on if he's using my computer when I arrive (he's actually pretty computer illiterate) and how long he stares in uncomfortable silence.
Another day in the life.