Last year in my dorm [was built new in i think 2002 or 2003], we'd smoke in the bath room. There were sprinklers in the bathroom, and then smoke alarms in the bedrooms right outside of the bathroom [think of 2 studio apartments connected via a bathroom].

Here's what we did: stuff towels under the doors, run the shower on hot [preferably put some shampoo/body wash in the bottom of it so it smells nice/covers up the smell], KEEP THE DOORS SHUT!!, and enjoy. My floor was a stoner floor-there was at least 6 sets of rooms out of probably 12 that smoked. We had more concerns about an RA coming by than anything.

We smoked primarily joints until i bought a one-hitter.

Now? I've got an apartment, so i just stuff my door, open the bathroom window, close the bathroom door, and enjoy my bong. No complaints/surprises thus far.