I didn't really try drinking any alcohol until I was 6 months post-op. I found I got roaring drunk from half a vodka cooler! I didn't like the feeling and it left me quite dehydrated. So I didn't drink after that until we went to an all-inclusive resort in January (9 months post-op).
By that point I had lost more than 100 lbs, was eating closer to 800-900 calories per day and exercising regularly (3-4 times per week at the gym, plus daily 4-5K walks). I found I tolerated the alcohol much better during our 2 week vacation.
But it's not something that is part of my normal daily life. I will have a social drink (just 1) during special events, but I haven't drank anything since returning home from vacation (over a month now) and I don't miss it in the least.
I was not much of a drinker before surgery, so this is pretty close to my normal drinking pattern pre-op as well.
It is said that VSG patients must be extra careful to monitor their alcohol use post-op as there is a risk of "cross-addiction". We give up our addiction to food, and substitute it with an addiction to alcohol! Very dangerous and easily done!
If you're going to have a social drink, try just part of one drink at first to see how you do, but I would certainly wait until you're at least 6 months post-op. You need to be solidly into a normal eating routine and above all, make sure you hydrate well before and after the drink, make sure your'e in a safe environment if you get drunk (it may not take much!) and of course, no driving.
Follow your surgeon and NUT's guidelines regarding alcohol consumption post-op and you will be fine.