Bulletin Today | Personal HealthIf you think the air in your nonsmoking hotel room is free of smoke residue, think again: If a hotel allows smoking in any of its rooms, the smoke will permeate everywhere, including nonsmoking rooms, a new study shows. Nicotine residues and other chemical traces “don’t stay in the smoking rooms,” lead researcher George Matt, chairman of the psychology department at San Diego State University, told USA Today. “They end up in the hallways and in other rooms, including nonsmoking …