Is your boss aware that you work two jobs?
If so, that's a bit of an arsehole move from him.

I recommend coffee, lots of coffee as well as red bull.

Second jobs can be a touchy subject for some bosses. I wouldn't be surprised if OP didn't say anything about the other job

You are in high deemand :)

You're a DJ, so I'm sure you can find inspiration in music. Maybe "Wake Me Up" by Avicii, or "Hawaii (Stay Awake)" by Waterparks.

Did you ever consider that you weren't hired to play music and only got the job because of your D-cups and Junior-size underwear? I hear that's how they name things now…

Sounds like you need a new job OP

Been there do that. The entertainment life is a bitch.

Sadly staying up late is a regular occurrence in a college kids life.. Poor you OP I know how you feel

And never sleeping is a regular occurrence in a new parents life. But, those are all things we choose to do. OP had no choice in this matter if they wanted to get paid. Pretty sure their situation is worse.

But 1) not getting up early and 2) sitting in a class is not as demanding as the average job

Coffee, coffee and more coffee! Hope you make it through the day!

Hope you got OT

Come on..
Man up a little bit !
During winter I work on the snow removal team for the city.I start at 7pm and often end my shift at 10am and start over at 7pm until 10 am for 5 days straight.I love it !
No time to be sad,depress or anything else.Work,eat,sleep.Repeat
You add a few dozen coffees and monster energy and everything is fine.

12: You're really comparing a 9 hour time gap to a 4 hour one? That gives you enough time to sleep, eat, change, etc in between compared to the OP.

Not everyone can do that. I was never able to work 2 jobs because of how my body hates me. Sleep disorders suck, really. Just because someone can't do what you do, doesn't mean you should belittle them. Maybe you should learn that aspect of being a man.