Longman Dictionary of Contemporary English
smoking room
noun
EXAMPLES FROM CORPUS
▪ All around the smoking room, gentlemen seemed to be standing in clusters laughing and clapping each other on the shoulder.
▪ Churchill in office would never have wasted time in the smoking room without an audience.
▪ It also had a smoking room, which was furnished with one electric light and pressurised to prevent hydrogen seeping in.
▪ Next to the open balcony in the King's coach was a handsome smoking room, supplied with central table and four armchairs.
▪ Tom had referred to the place as' George's smoking room.
Wiktionary
smoking room
n. A room designated for people who wish to smoke.
WordNet
smoking room
n. room in a hotel or club set apart for smokers
Wikipedia
Smoking room
A smoking room (or smoking lounge) is a room which is specifically provided and furnished for smoking, generally in buildings where smoking is otherwise prohibited.
Usage examples of "smoking room".
A direct mind-to-mind stimulation is much more effective than smoking room stories or filthy pictures.