Alcohol is another one of those YMMV things. I wouldn't suggest drinking often or much, but liquor is generally carb-free; just make sure that whatever you mix it with is also carb-free. Dry wines are lower in carbs and regular beer is pretty high in carbs.
Your body will also burn alcohol for fuel in preference to fat so your weight loss could be put on hold for a few days.
If you do decide to have a few drinks, make sure you also drink more water than usual or you could wind up with a killer hangover in the morning. Alcohol is a diuretic and low carbing also has a diuretic effect. Between the dehydration and the alcohol...ouch! You may also want to have a designated driver if you plan to have more than one drink as many people report that they get drunk much easier when low carbing than they would otherwise.