There is some sort of agreement that calories and other nutrition data are not presented on the labels of alcoholic beverages.

But this info is listed in the [USDA.gov nutrients database][1].

For example, [1 jigger or 1.5 oz of 80 proof vodka has 97 Calories.][2] These calories represent "metabolic energy," which is energy that can be actually used by your body.

Indigestible dietary fiber, for example, cellulose, has some combustible energy but no metabolic energy.

A source that claims that alcohol contains metabolic energy:

 - [European Journal of Clinical Nutrition][3]: Alcohol has 29.6 kJ (7 Cal) of combustible energy and 29 kJ (6.9 Cal) of metabolic energy per gram.


  [1]: https://ndb.nal.usda.gov/ndb/search/list
  [2]: https://ndb.nal.usda.gov/ndb/foods/show/4158?fgcd=&manu=&lfacet=&format=&count=&max=50&offset=&sort=default&order=asc&qlookup=vodka&ds=
  [3]: http://www.nature.com/ejcn/journal/v61/n1s/fig_tab/1602938t3.html