[1] Such rooms are commonly equipped with chairs, ashtrays and ventilation, and are usually free to enter, although there may be a smoking age restriction.
Cigarette companies have worked hard to ensure smoking was accommodated in major airports, which are high-profile locations serving many people who are often bored or nervous.
[3] After dinner in a large private house, the gentlemen might retreat from the ladies to a smoking room, furnished with velvet curtains and decorated to masculine tastes (wealthy owners would often choose Turkish themes and weapons collections), and replace his tail coat with a comfortable velvet smoking jacket and cap.
The velvet was intended to absorb the smoke, to avoid contaminating other rooms and clothes.
Mental health units in the NHS providing long term in-patient care also have an exemption allowing the provision of designated smoking rooms for patients.