From policeone.com (it's on other sites too, but video only, which I hate)

Quote Originally Posted by policeone.com
Bartender fired for reporting drunk driver to police

Her boss told her reporting drunk people to the police was bad for business

ABC10 News
SHELBY, Ohio — An Ohio bartender is now looking for a new job after she was fired for calling the police on a bar patron.
Twyla Devito was bartending at an American Legion Post when she called police after she saw a man leaving drunk. According CNN, Devito said she came into work that day and saw the man, who was a regular at the bar, already hammered.
When he left the bar, she called police. Officers later charged the man with an OVI or Operating a Vehicle Under the Influence, after blowing a .16, which is twice the legal limit.
so, here's the rub: was she right, morally? Yes, probably, but others are saying in the comments section that she still served him so if he killed someone, the bar (and most likely she) would be charged with negligence homicide.

So...if you're the bartender and a patron is shit-faced when you arrive, do you pour his ass into a cab or what?