Last year's Decadence was the largest indoor EDM event in North America, with an attendance of nearly 40,000, and it happened right here. Colorado favorites Bassnectar and Pretty Lights headlined alongside Tiësto and Above & Beyond — and those were just a few of the acts to grace the stages of the Colorado Convention Center. Decadence has listened to the concerns of fans over the years and now offers free water stations and organized ticket lines. And the production features much more than just the DJs, with confetti cannons, balloon drops, lasers and panels upon panels of mapped LEDs.