Please do not wait until the night before the dinner party to tell the host that the two friends you will bring can not eat two thirds of the dishes that will be prepared. My gosh. The dishes were decided two weeks ago, two weeks prior to the party and were listed in the invitation for all to read. Also, I'd sent out a message last week asking for everyone to let us know if there's anything they can't eat. The problem isn't just that I wish we'd known sooner so that we'd have time to modify the menu, especially before buying the ingredients, but also I am uncomfortable with having put so much effort into organising the preparation of food for 30 people and 2 of them will bring food from outside. Almost feels like my hosting is being put to shame, especially as I'd hoped for a party where we would all share food as well as conversation..