[Nervetattoo]

I've thrown some hackathons at work and this is the model we always use. Friday after work + dinner we brainstorm and figure out what to do and then we might prototype a bit. Saturday we meet again refreshed and hack, we dont stay up to late and might even go for beers. Then we meet for another 4-5 hours on sunday to make a wrap of it.

Personally I can enjoy both the 24-hour/whatever-hour stretch and the weekend-with-rest style, but I find the first one to require working with someone with whom we feed energy to each other so we can maintain progress — I've just met one such person in my life and he doesn't live in the same country as me anymore. So in the end I prefer the weekend style hackathon now as well.