They seem to drink more when you’re around
When dealing with too much stress, including the stress of interacting with someone rude, people sometimes resort to less orthodox solutions, like alcohol. As a matter of fact, according to a 2018 survey conducted by the UK Mental Health Foundation, 74 percent of people surveyed claimed they felt extremely stressed over the past year while 29 percent admitted to turning to alcohol as a means of coping.
Therefore, if you notice someone chugging drinks just to avoid having to talk to you, you might want to give them some space.