For mixed drinks, the best way to track alcohol is to log the liquor and the mixer separately.
For example, for a single, tall whiskey coke you could log 1.5 ounces of whiskey, then log the 4 oz of Coke/Pepsi.
If you are logging a non-mixed drink, like a glass of wine or beer, you can then look up the item in the food database and log the serving size that you had.
