One of the Culture novels do include a lengthy descriptions of a party that had lasted a ridiculously long time. Hydrogen Sonata possibly... There are quite a few descriptions of utopian societies partying in sci fi, but usually as an excuse to make one group or another stand out as gloriously debauched to set up the inevitable downturn when someone crashes the party or some character or other at the party is forced to face real life.
But they can be interesting stories in their own right - just probably not easy to expand to novel length.
"The longest and most destructive party ever held is now into its fourth generation, and still no one shows any signs of leaving. Somebody did once look at his watch, but that was eleven years ago, and there has been no follow-up.
The mess is extraordinary, and has to be seen to be believed, but if you don't have any particular need to believe it, then don't go and look, because you won't enjoy it.
There have recently been some bangs and flashes up in the clouds, and there is one theory that this is a battle being fought between the fleets of several rival carpet-cleaning companies who are hovering over the thing like vultures, but you shouldn't believe anything you hear at parties, and particularly not anything you hear at this one.
One of the problems, and it's one which is obviously going to get worse, is that all the people at the party are either the children or the grandchildren or the great-grandchildren of the people who wouldn't leave in the first place, and because of all the business about selective breeding and regressive genes and so on, it means that all the people now at the party are either absolutely fanatical partygoers, or gibbering idiots, or, more and more frequently, both."
Sounds like most episodes of Black Mirror. And they certainly offer cleaner and more convenient futures, just the opposite of utopian in concept and in tone.
