I'm tinkering with this at the moment.
I used to have a bottled beer a day (minimum) but I recently found that I could no longer deal with this.
So I have been drinking mainly white wine and a snifter of whisky or brandy before bed.
As noted elsewhere my BG has been elevated over the last week.
I cut right back on the booze just to see.
Had a few chips a couple of days back (again just to see) and instead of the quick spike then drop my BG just kept on slowly going up and up.
Ate at 15:00 and by 20:36 BG was at 9.5.
At that point I had a large whisky and my BG dropped like a stone.
5.6 by 23:20 and still going down.
I cut out all carbs (instead of having 20 grams or so) and all booze and my BG is now at more sane levels.
Today I have had, for lunch, a tomato and some cheese and a glass of white wine.
Again immediately after the wine my BG dropped sharply.
I must note that when I have been high because of carbohydrates then alcohol takes my BG down, but it can then come up again over night and through the morning.
So alcohol may just interrupt the processing of carbs for some people, not act like a shot of insulin.