For the last couple of months, I have tried very hard to eat vegan (certainly vegetarian) for breakfast and lunch. In the evening I allow myself to eat whatever I want!
During the week, B/L is at my workplace cafeteria. I've noticed that the fact that I eat this way has not escaped the notice of others. The workers behind the counter initially asked me questions, but now they know what I want ... and other patrons sometimes comment on my selections or say "I know what you'll be having."
Truth be told, some days it is difficult to stay the course, but the unanticipated accountability helps keep me focused. I can say that things are much easier now than in the beginning.
I hope drinking will turn out much the same. I look forward to everyone knowing that I don't drink. They don't need to know the "why" any more than my workplace colleagues need to know why I make vegan/vegetarian selections.
Have a great day!