I also just sort of stopped drinking. I don't consider myself a non-drinker, it's just, well, whenever the opportunity arises I consider it and decide I prefer

I also just sort of stopped drinking. I don't consider myself a non-drinker, it's just, well, whenever the opportunity arises I consider it and decide I prefer not to mess up my sleep and feel lousy the next day for an experience that, frankly, is less enjoyable than reading a book or playing a game or something else that I enjoy. As for the dietary calories, well, you can hack that one. I don't recommend it for obvious reasons, but a diet of nothing but extremely lean protein, fiber (not strictly necessary, but it's nice to have some flavors other than meat, fish, or egg white), and ethanol (with virtually no dietary fat or carbohydrates) cannot, and I mean it is a proven metabolic impossibility, cause the gain of bodyfat. There is no storage form of ethanol, and the storage form of protein is various lean tissues. Now you might ask, but what about glycogenesis? Won't the body metabolize that protein into glucose and then store that glucose as body fat? That's a perfectly reasonable thing to suppose, but it's proven, in strictly controlled metabolic ward studies, that it does not happen. Instead the kidneys just eliminate the excess protein. Glycogenesis is only used for immediate energy needs, and of course the body will preferentially use ethanol for immediate energy before protein.