I tend to play a lot at night. Typically I practice every night from 10:00 PM until 3:30 AM. Then I sleep until 5:30, and then get up to get ready for school around 6:00.
I've learned to live without sleep at night.
Sleeping through Astronomy class isn't hard to get away with. I also like to sleep at lunch. It works sometimes.
Energy drinks also help. Although, one day I had 3 Jolts in a row

, and I actually started shaking. My heart rate shot through the roof, and I felt sick.
Gross...
But I digress...
Try playing a nocturne at night (what a novel idea!)... it's fun. I wrote a nocturne around a month ago. I play it every night around midnight and it really gets the feeling across. When I play it during the day... it doesn't sound right.
But life without sleep is fun. You should all try it!

(And yes... that little emoticon is also saying "it's cool to wear sunglasses at night.")