Midton, I know what you mean about noticing people around you actually aren't drinking. For awhile there, I would drink every opportunity I got or every event I could and thought that's what people do right? Wrong. That's what I did, and I was drinking way too much. I've also definitely noticed when people are drinking.
At work on Fridays a couple of the ladies like to start drinking before they head home. Twice in the past week, I've heard the sound of the wine bottle gently being set on the counter. I'm like I know that sound. And I know the routine of going into the kitchen for a few minutes, trying not to make any noise, pouring it into a discreet container, and leaving no evidence. At work and at home lately I've purposely and proudly left my beverage out in the open because I don't have anything to hide!