Why don't we try something that hasn't been mentioned here yet, DEREGULATION!
When the clock strikes the hour of 2am, what happens? The entire population of revelers in clubs good and bad, drinkers responsible or irresponsible are set onto the streets en masse.
Let the owners of the clubs determine how late they wish to be open. Some will stay later, some will close earlier depending on what "their" crowd desires...
Instead of an environment that encourages "power drinking" in anticipation of closing, let the public determine how much and how long they desire to party and drink.
Local government has tried many ideas, none of which have worked. Let the marketplace work. Police resources would not have to be geared up for a 2am battle and the taxi companies would not be overburdened leaving intoxicated folks no choice but to drive themselves.
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