Five friends booked a fairly expensive holiday. No need for details but think mean girls mentality - four against one.
All four unfriended Friend 1. Fair enough, everyone is adult enough to decide who they want to be friends with.
However, Friend 1 - understandably - does not want to now go on holiday with four girls that are mean to her. She is not entitled to full refund but will get a % back if she cancels. This would mean four friends have to pay a nominal increase. All can comfortably afford it.
Four friends refusing to cancel Friend 1 booking.