Story time: This is what I found when I went to work Friday morning:

This is the doorway to the office I work in. There’s never been a locked door here until Friday morning, so this was something of a surprise. There’s a box for a card reader, but no card reader had been installed yet, so there was no way for me to unlock the door.
I went around to the office next to ours to see if I could get in that way. Same story: locked door, no card reader, no way to unlock it.
I tried three different ways to get in. I finally found an open door on the far end of the hallway, halfway to the other end of the building, and had to walk back to our office.
Ready for the kicker: Here’s that door into our office again:

NO GLASS!