If I’m driving lunchtime I’ll only have soft drinks. I never risk one or two as some do. I am more conscious of the morning after nowadays but think I must have been over the limit lots of times, especially if that calculator is close to being accurate.
When we had a pub on site, at work it was a regular occurence for many to have three or four at lunchtime & drive home a couple of hours later. You could also get a beer or wine at any of the restaurants on site & spirits at a couple of them. They used to provide beer & wine in meeting rooms, McKewens Export for the men, white or red for the women. 4000 alcos leaving work at 4. Roads were a nightmare.