Holiday hangovers … 'Tis the season of drinking. A survey found that the average American consumes twice the number of alcoholic drinks over the holidays than any other time of year. 69% said they are more likely to socialize over the holidays. This socializing results in three hungover mornings per week during the height of the holiday season, and the average adult calling in sick twice due to partying too hard the night before. 70% of those surveyed said hangovers make them less productive at work. And one-third said those rough mornings actually dampened their holiday spirit.