Someone in here has gone to a lot of trouble to arrange or Christmas night out. Obviously not everyone wants to go, which is fine. But someone has just said, very loudly, in front of the organiser, "God no, I'm not going. I've better things to do the Friday before Christmas".
AIBU to think this is rude and ignorant. I've seen this before - people unable to just say 'sorry I can't make it' but have to make big statements about 'having a life' or 'not socialising with colleagues.