I believe you're referring to a thread I initiated because of questions I got while teaching my weight loss class. I firmly believe that the calories in vs. calories out go when it comes to alcohol just like anything else. If you drink a lot of alcohol, you consume many calories. You will gain weight (or not lose weight). It's no different than asking if it's true that you gain weight if you eat a lot of chocolate (and you will, in case you should be in doubt. lol). Of course, what can severely influence is that lack of judgement often comes with alcohol, and you may drink/eat more than you actually think you do.
Sure, there is a dehydration factor and all that, but IMO this matters absolutely nill. We're not here to lose water. We're here to lose fat. Water will come and go no matter what we do.
"Losing weight is never about eating as little as possible"
"You wouldn't worry so much about what others think of you if you realized how seldom they do.
― Eleanor Roosevelt
"Do. Or do not. There is no trying."
- Master Yoda.
From October 4th 2010 to April 3rd 2012 I lost half my body weight - 80 kilos/170 lbs. Since then, I have had two cosmetic surgeries to remove excess skin. I have now quadrupled my strength, gained several kilos in muscle mass, and today I focus on building muscle, optimizing my diet, and living healthy. I am stronger, healthier, thinner, happier!