Eggnog has been a White House holiday staple for centuries. Was it served during Prohibition? Certainly during the Harding administration probably not during the years Herbert Hoover was in office. Here is a version of the traditional drink served at the White House.
WHITE HOUSE EGGNOG (30 servings)
Mix eggnog, bourbon, rum and brandy. Pour over ice cream if desired. Add vanilla to taste, if desired and sprinkle top with nutmeg.