People tend to give up on going to a show pretty easily if there’s any obstacle involved, so when I heard that Las Vegas Boulevard was shut down for the Rock ‘n’ Roll Marathon, I immediately pictured the Hard Rock Live with Relient K, Motion City Soundtrack and friends playing to an empty room as marathoners ran through the streets below. Thankfully, my visions were a bit dramatic, and the turnout was respectable – especially for a Sunday night. ...