I once got called into a meeting by my manager because I had organized lunch for a small group in my department and had not invited one woman (who sat on the opposite side of the room and never talked to any of us). Out of 21 people, only 3 of us got together to get pizza (we all sat near each other). Because this woman was not involved and had wanted to be (how were we to know?), she complained about me. My manager was laughing and agreed that it was dumb but I still had to be talked to. After that we did a group lunch like that one more time, and included the complainer. After that I never organized group lunches again.
