Beer and cigs on your way to a job interview - no offense, but unless you and the interviewer are both smokers, this little favor / errand could cost you the job. I would be able to smell your neighbor's smokes on you, and if we had a nonsmoking policy, or if I were just a beeyotch (hey waddya mean, "if?!") I might reject you just for the smell of the neighbor's cigs.

It just really bothers me that you were on your way to a job interview, and they had no respect for that. Any extra time you scheduled for yourself before the interview belonged to YOU, and was not to be used running errands for them. It was job time.