<p>Chem-free housing basically is a floor in one of the buildings in each community where everyone on the floor signs a contract (during housing signups) saying that they will not use any substances, including alcohol at all. This goes for downtown as well. If an RA catches you drinking or doing drugs downtown, they can (but it will depend on the RA if they will) write you up. As far as I know, you are not responsible for your roommate’s behavior but if you both choose to be chem-free then you probably won’t have a problem.</p>