My high school went to NYC my junior year for a trip. I was rooming with my best friend, who happened to be a huge stoner. Right we got off the bus and into the hotel, us and four other guys rooming next to us met in our room to decide where we wanted to explore first. The second everyone was in, however, my room mate pulled out a bag of weed and a bowl. We were all really hesitant, since you know chaperons get really strict on these types of things, but he told us that if we soaked a washcloth in water and rolled it up, and then exhaled the smoke through it, it wouldn't smell. This didn't work at all. What a fucking stupid idea. Why would that work? But since we were all naive, inexperienced stoners, we did it and the whole 5th floor of the Midtown Holiday Inn reeked of weed. We immediately left the premises, and when we got back, security was on the floor so we left again until night when they finally left. Never trying that again.