As someone in the third group, the trick is to fight the sleepiness long enough that you end up in the first group, usually with a heavy dose of caffeine. I think that may be why "and Coke" drinks are so popular. And then you can karaoke endlessly and go find pizza and gyros at 4AM.

And then feel like shit the next three days because now that you're over 30 your body takes umbridge to such abuse.