When the Princeton University math department had an event or threw a party, the staff put an invitation into the cubbyhole of each faculty member and grad student, with their name on it. Everyone except me, that is.
K once returned from a trip to find in his pigeonhole an invitation to a party for math faculty and grad students, that had taken place while he was away. It was addressed to "Dr. & Mrs. K". Since he was a postdoc, K's pigeonhole was in a room marked "Faculty Only", so I wasn't allowed in (and I couldn't sneak in since the graduate secretary's desk was right outside the door). I didn't go to the party since I hadn't known about it.
I went to the department office and asked why all the other grad students got such notifications and not me, and was told the department was saving paper. I pointed out that I wouldn't necessarily find out about something before it happened, if K were traveling. This didn't bother the secretary. Pleading that I had as much right as any other math grad student to have an announcement in my box, with my name on it, led her to think of me as a radical feminist and a troublemaker.
The pattern continued at Ohio State, though the salutation was sometimes different. To welcome me to the faculty when I accepted the job offer, an OSU professor (who later became my Dean) sent a letter addressed to Profs. A/B (where A and B were K's and my last names), Department of Mathematics, Princeton University, Princeton, NJ 08544. Why he thought we shared a mailbox or should receive shared mail is anyone's guess. In addition, I wasn't a professor (I didn't yet have a PhD), and K didn't have an appointment or mailbox at Princeton University at that time. Somehow it made its way to me, since I have the letter.