If yes, how does the dorm choice work for them?
I have no idea how general this is-- in my S’s case, the coach encouraged the athletes to pair up, but it wasn’t mandatory. Houses were also by choice. By your question, do you mean how do they ask to room together, or how is the experience for them rooming together?
My kid is a Penn athlete. Had a teammate for a roommate freshman year. It’s been a while but I would think your coach or recruiter could answer that for you.