Just take a joint and smoke it...

last year i went to see a Muse concert, and then a Radiohead one a couple of days afterwards at the same venue. First time i didn't bring weed because i was paranoid of getting searched...turns out everyone was smoking. Come Radiohead, i bought half a dozen pre-rolled, got to the centre of the crowd and had a made a fantastic smoking circle with some like minded strangers...was a blast...

moral of the story...excercise your right to smoke