I lost weight, the operative word weight (I wasn't watching the fat or muscle) once on what I call my 'playstation' diet.
All I was doing was being addicted to Final Fantasy and Tomb Raider, drinking little Stella Atois most of the day and maybe one or two meals a day.
I did this for about two weeks before I started one new job, it was a bit of a holiday at home for me.
This was before I was a BBer of course.
Alcohol has 7 kcals/g, fat has 9 kcals/g and protein and carbs have 4 kcals/g.
I think that red wine are spirits are better choices if you really have to have an occasional drink.
Some call beer liquid bread. I would factor it into your daily calories.