Bartenders ARE Liable for drunks leaving their bar and driving. Its hard to prove and usually doesnt happen, but thats the way the law is. Kind of fucked up actually since the customer can leave the bar sober-ish, and drink a fifth in their car and then drive… and then blame the bartender.
Bartenders are also liable for underage drinking, even if ID’s are checked at the door.
In other words, be careful if you’re a bartender.