You needed to move out yesterday. Think what would happen if the police can over for whatever reason and they "accidentally" found his narcotic paraphernalia. Trust me, you may be charged just for being in the room. I'm not sure where you are located, but in california it may be legal in the state to have medicinal marijuana, but the feds sure as hell don't recognize the state law. The last thing you need is to either fail a drug test or have a narcotics related offense on your record.

Besides, don't you know second hand smoke kills too?<just had to throw that in there>.