The office in which I work is located directly next to our gift shop. We usually leave the door between the two open, but it is quite clearly two separate spaces: one public and one private.
Still, I can’t count the number of times a gift shop patron has wandered into our office, looked through our interal library, perused the office supplies, and pulled one of us aside to ask such important questions as, “So, is this your office?”
YES!!!
Drives me nuts. I work in a museum. I am not an exhibit.