Misgendered four times in succession at the dinner table, with my quiet "they, please" getting louder each time. They had the good graces to apologize after realizing what they were doing, at least. But still. That didn't feel great.
(Not asking the parents to do "she," since it feels really weird coming from them)
@literorrery It was kind of upsetting, but fortunately didn't ruin the meal for me.