Dinner party on the tube

If you're sick of hearing dire reports about gang warfare on London streets (and it is happening - no doubt about it) and you tremble each time you have to go on the tube, take a look at this http://www.youtube.com/watch?v=ywLhNwSBizE&feature=dir. Now there's a good attitude to tube travel and community spirit. Good for them - although I don't know quite how they got away with it...