I can say from my first ever--and killer--hangover that slumber raves are the way forward. Incidentally, I am not talking about when you pass out in a nightclub here.
Slumber raves are a much-loved attraction in Glastonbury. Imagine a club with beds, not seats, and a selection of dressing gowns you can borrow if you want to get ready for bed. It’s essentially a rave but when you get sleepy (or not, as the case may be) you can just pop your PJ’s on and go to bed right in the nightclub. Crazy people also wander about filling up hot water bottles and handing out mugs of hot chocolate as well.
I went to a slumber rave which was part of the wrap party for the Mutate Britain exhibition, but do check out one near you too as they are awesome fun.