I was speaking generally - I've found that in many state schools, the largest, most tall building is always freshmen housing, co-ed. UNH's Freshmen dorm, Stoke, is a 1-in-10 dorm for smoking in a dorm without worrying... If you have a building like UNH's Stoke - freshmen co-ed 8 floors... Anyway, the point is, there are certainly 1 in 10 dorms that you can get away with it in. My frist year in college, I opt'd for "Stoke Building" - 8 floor co-ed. It was like living in a drama pool where everyone just wants to get laid. It sounds good at first, until some kid who's never had sex or girlfriend either: blow up your spot- girls leave, and "fall in love with girl across the hall syndrome" - It makes high school drama look pussy, college frosh dorms is high school drama on crack - sometimes legitimately. Oh, and on Thursdays, someone always pisses on the hall floor. Always.
Point is, if you get stuck in one of these dorms, I will bet kids smoke in it just as much as we did. These are the only dorm times we could safely smoke in. Always have a easy spot to hide EVERYTHING under tide fresh papers for laundry, and have popcorn ready to burn in the microwave. This strategy has legit gotten my current housemate (roomie at the time) out of getting our room searched. He just nuked xra butter popcorn till it smoked up like crazy... sure it made the fire alarms go off, but my roomie just said he made popcorn and when he came back into the room it was on fire. Got off without the cops finding the QP of headies in the closet, in the bag, in the bigger bag, in the jar, in the plastic wrap surrounded by fresh fabric laundry shit.
ORRR, you could just do what I do every semester: Meet your RA. You wouldn't believe it, but I always made it a habit to be friendly, go out for drinks, etc, with my floors RA. After a few drinks ask if they care about smoking weed, if they smoke, you're in the green. If they don't smoke, just be active friends with them, joke about keeping shit on the DL or warn me first before you call the cops. If they do smoke, invite them to a smoke sesh ASAP - you only need to do this one once. he can never bust you now for fear you will rat on him. I've found these friendly relationships change immediately after you change dorms. Using these techniques I never once got questioned for any odd smells (fresh bud, not on fire) or for the heavy traffic coming in and out at all hours.