Even if you drink something like straight-up vodka or whiskey, your body takes ethanol and converts it to acetic acid (vinegar). The alcohol gets metabolized before the food you eat which is problematic.

"So...how does alcohol make you fat, especially when it doesn't have any fat in it? To understand how this process occurs, let's examine the consumption of a 5 ounce glass of red wine by a fictional character named Vinny.

Vinny takes a drink. As the alcohol enters into digestion, it is split into two compounds: fat and acetate. The fat is taken through the bloodstream and stored wherever Vinny tends to deposit fat. The acetate is taken into the bloodstream and used as Vinny's primary energy fuel."

http://ezinearticles.com/?How-Alcoh...u-Fat&id=215762

But who knows... maybe you can handle it and your body is just stalling.