Yes; it seems unthinkable today, but people used to smoke at their desks in open-plan offices. And lunchtime drinking was absolutely normal (I worked at more than one place that had on-site bars that were open at lunchtime).I think if one was transported back to the 1970's it would be a bit of a shock how much dirtier & smellier a lot of things (and people) were. Not to say it wasn't a great time to be alive, I'm quite nostalgic for the period, but standards have changed a lot since then.
The changes in the law regarding smoking have absolutely improved working and leisure environments (at least for the non-smokers!).