This question may seem like it has a straight-forward answer, but really, it doesn't. In fact, while we don't mean any disrespect to Bob the Bar Guy, this seems like a particularly odd request for bartender interviews.

Of course you want drug-free employees in the workplace, but since you're running a bar, a drug test doesn't make much sense. According to Norml.com, while urinalysis tests are particularly sensitive to marijuana, they aren't as effective at reporting recent harder drug use, and they don't show alcohol results at all. You could be hiring an alcoholic as a bartender, and your drug test would do nothing to warn you of that.