LONDON - MAY 31: A party reveller bites into a London tube map sticker in a carriage on the London Underground during a Facebook cocktail party on the Circle Line on May 31, 2008 in central London, England. Tonight is the last evening when Londoners can consume alcohol on public transport. The cocktail party, organised on the networking Web site Facebook, attracted thousands of revellers to enjoy one last drink on the London Underground before the ban's enforcement on June 1, 2008. The ban, introduced by the new London Mayor Boris Johnson, is an attempt to clean up unruly behaviour on the London public transport system. (Photo by Daniel Berehulak/Getty Images)
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Getty Images News Daniel Berehulak