Why would someone do coke for the first time when they are likely to be subjected to a drug test only days later?
I'm not one to judge, though. I'd fail a drug test for sure, though for pot, not coke. When I applied for my current job I was told that there would be "drug screening", which I was concerned I would fail. As it turns out, their idea of drug screening was just a questionnaire, my answers to which I'm sure they correctly interpreted as "I smoke pot". I got hired anyway. I don't think many companies could afford to not hire people 'cause they smoke pot in my neck of the woods.
I had a freakin' crazy evening a couple of weeks ago with two coworkers and the assistant manager of the company I work for. I wouldn't have done the same around her boss, the manager, but if she were inclined to care about my using drugs she could sure stir up shit for me. Fortunately, considering she doesn't do any drugs herself, she's pretty cool about it.
Anyway, if you did get tested, I hope you passed.