I'm about to attend a 500-person college party where I'm sure more than half will be sorority girls.

I've never gone to a college party as I would purposefully avoid them. But my friend group convinced me to go.

There will be 10 of us going together on a 50 person bus.

I have zero dance moves (and not even like a sense of rhythm) and I tend to verbally shut down in group environments.

I'll get there at 9 and it will go till 1:45. I'm there the entire time till the bus picks me up.

I don't know the music very well and I'm pretty shy but I did this because I wanted to see what it's like.

Now I'm incredibly nervous and I'm wondering if there is any advice.

TL;DR I don't relax easily and I'm going to my first party where I know I'll probably be uncomfortable. Any advice?