1. Having excellent hand-eye coordination benefits every aspect of your life. Except hammock napping.
Plenty of drinking games, like quarters, beer pong, and flip cup, require a high level of hand-eye coordination. And those skills have uses outside of the party scene, as the better you get at it, the more you can increase your "reaction times, as well as enhanced agility and athleticism". It could even improve your "typing skills", though that could also be construed as a negative if you're using said skills to text your ex after seven games of pong at 430a just to tell her "tht song u lik is on".