What’s the secret to the Warped Tour's longevity? We’re guessing it has something to do with staying on top of what’s happening now and what's coming up next in the worlds of alt- and indie rock. The daylong music festival has survived most of the others that popped up around the same time in the mid-'90s, mostly because it's aimed at young fans, with as many as 100 bands showing up on tour stops to play short sets spread across nearly a dozen stages. They're the kind of gigs you can join in-progress, just in case there are other things, or groups, occupying your busy schedule. It all kicks off at noon, and we suggest sticking around for the entire thing. This year’s edition features veteran Warped bands like Yellowcard, Taking Back Sunday, and Senses Fail, along with red-hot up-and-comers like Cleveland rapper Machine Gun Kelly (pictured), who's prepping for the release of his much-anticipated major-label debut album later this year. Expect his set to be a highlight of the long, hot, and sweaty day. Noon Tickets: $35.–Peter Chakerian