OMG, you folks are so young. Yes, you could smoke anyplace. You smoked in your office or anyplace you worked that didn't have flammable items close by. I had wisdom teeth taken out (1977) and was kept overnight in the hospital due to some minor complications that they wanted to watch. I had slept most of the day so I was wide awake at night. I walked up and down the corridors smoking away. Airplanes, yes sir, you could smoke on those as well. Disney world... anyplace you wanted other then the show itself. Restaurants, yup, right at your table. It's a wonder we aren't all dead isn't it. (that was sarcasm)
Drinking, I don't remember as being everywhere. That was mostly social or in a bar. Most people did not require alcohol to get through the day, but, did enjoy a cocktail or two at the end of the day. In business, there was usually a pop or two at lunch but I don't remember it ever in the workplace, at least not out in the open. One of the most popular Christmas gifts given by businesses was a fifth of Whiskey.
Ah, the good old days!