The other week I was invited to join a departmental "Christmas lunch". I don't often get invited to group lunches so I was quite pleased with the invitation and said yes (I'm not in the same department but part of a much smaller team which sits next to theirs).
We had pizza and fried chicken and a cake, not loads of food.
I've now been told I need to pay £40 for my piece of chicken and half a pizza! It's so expensive because apparently half this team had their birthdays recently and this is their birthday treat so we must all pay for them!
It was my birthday recently too, not that any of them cared about that. I feel I was invited just to pay for their lunch. It was really awkward at the meal. I was one of the first to sit down and everyone else clustered themselves away from me leaving the seats next to me empty until the last person showed up and had no choice but to sit next to me.