I need a part time job?

I currently am an intern in a prestigious athletic department. I do get paid, but after taxes, it only amounts to about $900 a month. I need a part time job, but my hours are not that flexible. I work 9-5 every monday thru friday, and some weekends/weeknights when i have to work basketball or football games. The upside to that is that i know the schedules, so i would know when i can or cant work. My question is basically what would be a good part time job for me where i could make a nice $300+ extra a month. I really need this to continue to pay my dreaded student loans!