Even if you reserve a non-smoking room, the smell of smoke can circulate through the hotel's air vents and cause your clothes to pick up the odor. Smokers also sometimes smoke in rooms that you are not supposed to smoke in. If you just can't stand the smell of stale smoke, look for a hotel that doesn't allow it at all.
Kahit na taglay mo ang isang non-smoking room, ang amoy ng usok ay maaaring kumalat sa pamamagitan ng air vents ng hotel at maging sanhi ng iyong mga damit upang kunin ang amoy.