I think smoking is going through a mini-resurgence right now.
I think back to my childhood and smoking was everywhere. My high school (graduated in 1989) had a smoking area for students. Cigarette smoke wafted out of the teacher's lounge. Kids would light up as soon as they got off the bus on a field trip. I don't have many specific memories of it, but people must have reeked.
Alcohol was also huge. We had a fifth year of high school (grade 13) and so there were plenty of 19 year old students and the drinking age was 19. Students would buy beer on their lunch period for the weekend and store it in their locker and nobody thought anything of it.