There are parties and parties, though. They don't all involve getting shit faced.
The ones my parents had and attended at new year normally involved between 5 and 10 adults. No sit down meal, some years they got takeaway other years a buffet or just nibbles. They would chat have some drinks, play some music, maybe play games like trivial pursuit or pictionary, then put the TV on for the countdown and fireworks.
At midnight everyone got in a circle of Auld Lang Syne, then went outside to see if anyone nearby had fireworks and to wish the neighbours happy new year.
We kids were welcome to stick around and join in or do our own thing in a different room until the countdown. One year we all watched a film upstairs, other years we joined in games, or switched between joining in and hanging out in the kitchen.
The bonfire ones involved about double the numbers but finished earlier. The kids would be there for the food and fireworks but often went off before/after.
No one got plastered, although occasionally someone was a bit daft and tipsy. All kids have grown up to be responsible and well-adjusted adults.