A: It is not permissible to smoke in Masjids or any rooms adjacent to them, for smoking is Haram (prohibited) and smoking in the Masjid is even worse and worse. The Prophet (peace be upon him) forbade whosoever ate garlic or onion from entering the Masjid, what about smoking in it! It is wellknown that onion and garlic are lawful foods but they have a detestable smell, so the Prophet (peace be upon him) forbade whoever ate them from entering the Masjid until the smell goes away.
If the person who eats onion and garlic does not enter the Masjid, how about a person who smokes cigarettes, which are Haram and harmful to them, their family, and whoever inhales its smoke. Such workers should avoid smoking in the room adjacent to the Masjid. They should give up smoking anywhere and at anytime, because it is prohibited and evil. It poses harm to them with regard to their religion, life, health, and economy; it is an utter evil. We ask Allah to grant guidance to all.