I'm not going to pay attention in my theater class
Is there a reason why you are not going to pay attention to class?
It's time to go out. Life will still be there when I get back
Since you are stuck in class you might as well pay attention because it's not like you have anything else better to do. If you want to ditch class next time then that's a different story but as long as you are in class you should try to find the enjoyment of theater class or your classmates will think you are uncool.
So you're saying I should just focus on being cool?
I'm not really saying just that. I'm mainly getting at paying attention in class shouldn't be viewed as uncool. Getting through class and then relaxing afterwards would be more beneficial to you.