The preface is that we don't have a lot of friends, but we do like to host.
So a couple of months ago I thought of hosting a proper NYE party. I invited three couples (two of them historically don't get along, but can tolerate each other if enough people are around).
DH was supposed to invite at least 2, 3 couples plus his sister.
DH didn't end up inviting anyone (maybe he'll tell his sister) and of the ones I invited one thanked me, one confirmed and one has confirmed (kind of). So the ones who have confirmed are the ones who don't love each other.
When asked for confirmation, they said "we'll still come if it's still happening" but out of transparency we said only the other couple has confirmed. They never replied back. So my DH thinks they'll make up an excuse, I think as it's technically still happening they'll come, even if they end up excusing themselves fairly quickly.