Much more efficient to get drunk early, who wants to sleep during the best part?
this is actually true...for example:
1.the typical method of getting drunk in the late night hours then going to sleep inevitably results in interruption of your body's recovery during sleep (even though you go out right away, your body is busy dealing with the booze to recover its normal functions) and a hangover the next day.
2. getting drunk in late night hours when it is dark and most things are closed and people are only at bars etc..it doesnt give you the same new, profound, ultimately refreshing view on reality as when you emerge hammered and it is still light out, you feel the sun, everything is lit up and you can see the world going about its daily grind, and you interact with completely sober society going about their motions until the night falls.
it is a truly different and enlightening experience. plus, you pretty much sober up by nightfall, so you still get the productive recovery sleep and typically do not feel hung over the next day.