The three martini office: Where drinking at work is a job requirement by Colleen Kane @FortuneMagazine April 12, 2015, 6:34 PM EDT E-mail Tweet Facebook Google Plus Linkedin Share icons Don Draper and many of the other Mad Men characters are poster men and women for a phenomenon once known as the three-martini lunch. The prevalence of heavy midday drinking among execs and other white collar types took a nosedive after the business meal and entertainment tax deduction was reduced to 80% in 1987 and then to 50% in 1994. But drinking on the job didn’t go away–it evolved. Now: workday-drinking tends toward beer, and it often takes place at the end of the day, as a perk for longer work days. It’s happening in numerous workplaces across several industries, and one of those is still advertising.