system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it, when people are drunk (often in films), they offer them coffee?

Often you see in films, and I have seen in myself too, people offering coffee to drunk people who tend to be very exuberant.  I would've thought the effects of coffee would further heighten said exuberance; e.g. Caffeine.
gpt
Coffee does nothing except keep you alert for a bit and in one place while you drink it. It actually will make your hang over worse, because caffeine is a dieretic as well as alcohol.

 Fun fact: if you feel as if you're going to vomit after a night of drinking, or feel full, you can drink a cup of water without getting sick because your body is craving water although you don't feel it yet. So drinking a cup of water after a night out will let you rest better and wake up without as bad a hangover.