Having someone hold two consecutive doors open for you, and being unsure if you should thank them once or twice. PGP.

“Hey guys, we’re actually booked to use the conference room at this time.” PGP.

Saying “Hey man!” to 10 different coworkers because you don’t know their first names. PGP.

Turning around when you hear too many people in the break room, just to avoid being social. PGP.