<p>Generally if she’s 21 and you aren’t, she’s not allowed to bring alcohol in the room. It’s as if she was under 21 in that way. You’d have the same exact problem if you had a roommate your same age who enjoyed drinking, just so you know. She would get in trouble for having the alcohol same as you would, especially since most alcohol possession cases don’t go to the police, they stay within the dorm/school.</p>
<p>Check your rules though, some schools have provisions for roommates with an age difference concerning alcohol. It may be that she has to keep it on her side of the room, keep it locked up, etc.</p>