In my experience, there are three types:
- Alive and well, as here - they are up at 6am, clearing up, making breakfast, rolling other people out of the way to vacuum etc.
- Still hungover, as here - the ones being rolled out of the way etc
- Still partying - arrive at 6:am straight from another party, hoovering up leftover pizza, talking at both the above types and keen not to stop the party until Jan 2nd at the earliest.