I can recall the week that no-smoking indoors at restaurants/bars passed and it was literally shocking to walk into a place and not have it be hazy. It really felt weird.
Anyway, air quality + quality of life was much worse. Sometimes the future does get better.
Today that sounds to me like urban folklore (or Big Tobacco folklore).
That's how the Kings Cross Fire started. Escalator full of potential fuel, smoker drops a used match, it falls inside the machine, fire. It wasn't legal technically to be smoking on that escalator, but it would have been legal in a few paces so "everybody" did it. The investigators found signs that such fires had likely started or almost started many times before, the disaster was just that this time it burned for long enough to create a pool of extremely hot gas flowing up the inclined ceiling for the escalator, and we got to discover the Trench Effect in the least fun way possible.