Boards
Do you know the names of all the people who work in your building / on your floor?
A good 60-70 people on my floor, easily 200+ in my building. I'd know the first names of about 30 on my floor, and if I'm lucky another 30 from the other floors. Maybe 2/3 of those I'd know their surnames too.
How well do you know the people you walk past in the corridor on a daily basis?