I worked at a telemarketing--er 'fundraising'-- firm for about six months. out of the four employees (myself included) that were there for my entire stint, 75% were IV heroin addicts, 25% were IV coke addicts, and another 50% were more than occasional recreational IV coke users, 100% were alcoholics, 100% smoked weed 5-7 days per week, 100% would shoot/snort/eat basically any pill put in front of them.
one coworker would take 2 hour lunches, come back and go straight to the bathroom, then stumble out 30 minutes later with his shirt half unbuttoned, his belt hanging unbuckled, bleeding profusely from multiple puncture wounds in his arm, head to his desk, make a phone call then pass out cold. this happened repeatedly and nothing was said or done by the dude in charge. the three of us that were addicted to opiates would go to lunch together and if we couldn't score in the alloted hour, we'd call with some retarded excuse and show up 30 minutes to an hour late-- nodding as we walked in the door. i can't even begin to guess how many times we had 'car problems' or 'trouble cashing our checks.' the supervisor allowed this behavior because we made him money, pure and simple.
i'm not going to lie, i still look back on that job as one of the most fun/insane 6 months of my life.