A ban on drinking in London's subway system — the Tube, they call it — began on Sunday. On Saturday night, London's best drinkers gathered for a Circle Line Cocktail Party, also known as the Last Round on the Underground. Thousands attended, 17 were arrested, two police officers were assaulted and Mark Zuckerberg made it all happen. Reports say word of the the citywide cocktail party spread only after 26-year old London banker Alexandre Graham created a Facebook group called "Circle line party - last day of drinking on the Tube." Soon after, several other Facebook groups formed with plans to party as well. "The point of it was just to make fun of how ridiculous the ban is," Graham told the Evening Standard. "I hope I don’t get sacked," he added. (That's British for "fired.") Below, ten YouTube videos of "the Last Round On The Underground." Graham's employers at the Royal Bank of Scotland, will want to examine them closely before determining his fate.