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A daytrip round the orbital Glasgow Subway (AKA Clockwork Orange) getting off at each stop to visit a pub and have a pint. There's 15 stops and therefore 15 pints.... Although it's commonly accepted that you should "Complete the circle" and finish back where you started, therefore having 16 pints in order to have fully conquered the Subcrawl.
by Stoo340 May 7, 2012