Re: serving alcohol
The problem is that common sense varies from person to person, depending upon one's way of thinking. That is the reason authentic Hadiths are there to guide us in such matters.
@Topic. there is a popular hadith mentioning the qualities of a mo'min that he does justice by "Wishing for others what he wishes for himself".
So if I don't want to be served alcohol, then how would it be easy for me to comfortably serve others what I don't think is good for Human beings. Can we become a source of causing damage to someone's health and yet sleep peacefully at night ?!?
Brother this question you have to ask yourself. If you think you won't be able to sleep peacefully, then better leave such job. (Though I do understand that you would inshaAllah understand the hadith mentioned in the first 3 posts)