We tend to do a lot of crazy stuff when we are drunk. Drinking Coffee, however, is something that should be avoided. According to research, it was found that caffeine masks the sedative nature of alcohol.
This, in turn, makes you feel energized. But the alcohol levels in your body still remain the same meaning that you are theoretically still drunk. By consuming while already having alcohol, you increase the risk of having a huge hangover and disturbed sleep.