It's frowned upon to drink at work.
Tony's coworker offers him a drink, from a bottle of alcohol he keeps in his desk drawer.
Tony has to decide whether to drink alcohol, while at work.
Tony declines to take a drink with his colleague, and lets him know that he would enjoy a drink after work, but not during his shift.
Tony decides that one drink won't hurt anything, so he accepts the drink he has been offered.
Tony continues his work day without needing to be concerned with having alcohol on his breath, or getting into trouble.
Later in the day, Tony's boss lets him know that he smelled the alcohol and gives Tony a verbal warning not to drink on the job.