Georgia code
Georgia DUI code
§ 40-6-391. Driving under the influence of alcohol, drugs, or other intoxicating substances; penalties; publication of notice of conviction for persons convicted for second time; endangering a child
(a) A person shall not drive or be in actual physical control of any moving vehicle while:
(1) Under the influence of alcohol to the extent that it is less safe for the person to drive;
The way I read Georgia law, you could be sitting behind the wheel with the car running, while drunk, and still not be in violation, so long as the car is not moving.
I'd double check with a Georgia Lawyer though, because in many states, just having access to the keys, even if you're passed out in a puddle of puke beside the car, will still get you pinched by the police.
Have the bartender keep the keys til next day or have someone take them from you.
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§ 16-11-41. Public drunkenness
(a) A person who shall be and appear in an intoxicated condition in any public place or within the curtilage of any private residence not his own other than by invitation of the owner or lawful occupant, which condition is made manifest by boisterousness, by indecent condition or act, or by vulgar, profane, loud, or unbecoming language, is guilty of a misdemeanor.
(b) This Code section shall not be construed to affect the powers delegated to counties or to municipal corporations to pass laws to punish drunkenness or disorderly conduct within their respective limits.