There’s a lot of this in kitchens, too. Really a lot. A rule of thumb that’s worked for me is: if people are drinking on the job, the job is so shitty that you need to drink to get through. Assume the carrot (alcohol) is roughly proportional to the stick (shitty working conditions).
Also, tangentially, what the hell is with people who get offended at what a person does or doesn’t put in their own body? We have a serious problem, culturally, with feeling like we have dominion over the bodies of others. What someone else eats, drinks, or wears is not up to me or you, and vice-versa. At the end of the day, our bodies are all we really have — taking someone’s bodily autonomy and choice away is profoundly dehumanizing, and the reason why assault is a crime.