I was in Amsterdam for ADE (Amsterdam Dance Event) and attended a 6 hour Tiesto show at the Ziggo Dome. The organization of this massive complex is amazing. Everything is clean and well organized. To purchase food/drinks, you go to a token machine that accepts credit cards, then use the tokens at the food stalls. Even though this was a massive party, everything was kept extremely clean and organized, which is a testament to both the Ziggo Dome and Amsterdam as a whole.