And it's possible that the non-alcoholic drinks -- soda and juices -- actually have more calories.
FWIW sugar-free sodas paradoxically do not promote weight loss. I recall reading that they are beginning to understand why this is but I don't recall the details now.
I find the idea of that type of experiment fascinating, perhaps you documented it in more detail....?
Findings didn't change that much, but the break itself changed the way I drink, I think. Previously it was somewhat of a social default to just go out with some friends over a beer in the absence of other events. Being conditioned not to do that, and instead stay in and have a quiet night at home has given some perspective. I felt like I got a slight time gain on the evenings, but nothing serious.
Friction previously played a role. Especially in my early valley days when I was an intern, or in college, or as a contractor (negotiation/business things are hugely greased by alcohol), but now that I'm full time at more quiet company where drinking isn't embedded in the culture, the social friction aspect is basically gone. It's a per-social-circle thing for sure.
Unfortunately I did no detailed documentation. The stuff I'd want to measure would require months of prep/control gathering (eg: how do I use my post-work time before and during experiment)
Most interesting part of the whole thing was how uninteresting it was. There's the idea that drinking is socially necessary and horrible for your health. The idea that it's so meaningless is a little weird.
1) Quitting had basically no social consequences. The friction of ordering a non-alcoholic drink at a bar is gone by the third time. Only one person gave me shit about it, and they were a friend-of-a-friend and easy to disregard.
2) It had almost no weight-loss effect, in the absence of other diet and exercise improvements. Premise was "does this one thing have a strong effect on my weight?". Given that my previous intake was moderate (< 8 units/week), removing alcohol and leaving the rest of my diet intact resulted in < 3 lbs lost early on, but no ongoing results.