Do I need to wear pants?

I’m participating in a summer program at a prestigious university over the summer. I’ve been watching videos of the program on YouTube and it looks like there are a bunch of impromptu night-time bonding sessions in the common area of the dorm building. There are also 2-person dorms. The only problem is that I wear over-sized shirts to bed and no pants. I’m really short so they look like dresses on me, but is it still inappropriate? I hate wearing things to bed and I would have to go out and purchase pajama shorts aw man. What do you guys think?

If it is in a common area, outside of your room, and it is mixed company, then yes, you need to wear bottoms of some kind. Take them off in your room before you go to bed so you don’t have to sleep in them. A pair of Nike or Soffe like shorts or leggings will suffice if you do not want long lounging pants or pj bottoms.
If it is all female, I would ere on the side of caution and still wear some type of bottoms. No one wants an accidental shot of your panties, or worse.

Okay thanks!