Never normally drink more than 3-4 nights a week but around Christmas it usually goes up. I try to bring it back to 2 nights a week in January. I remember reading some stat about the percentage of British people drinking 5 or more nights per week being really small (10% or something) and I don’t want to be the wrong side of that stat 
I don’t really find it affects my appetite at all - but 3 or 4 beers does tend to lead to eating a load of crap.
I drink a lot of the Brewdog AF beers - they had a 25% off in Jan offer plus I get another 10% anyway, so we ordered a load right after Christmas, although I had been regularly buying them from the supermarket anyway. I find the Punk AF especially is more or less indistinguishable from a normal beer. So it’s easy to avoid the habit of having a beer or two in the evening. There’s a few NA Weissbiers which are good after cycling as well.
I also get these Small Beer ones which are 2.3-2.5%. I don’t drink those midweek but use them to cut down alcohol content at the weekend (so replacing a 5%+ beer with a 2.3% one).
Separately and as above… I do find a mild hangover improves my cycling… I think this may be a case of expectations vs reality when I get started. Although I do notice pretty high negative HR decoupling if I do e.g., sweetspot workouts with a bit of a hangover (e.g., HR for a given power decreases over a workout rather than increases, which is what you normally see), and feel much better afterwards! I try not to make a habit of doing that though.