There's certainly no shortage of shows where it's perfectly acceptable to show up fashionably late, just in time to catch the headliners. But anyone who did this in September, when the LCD Soundsystem and Arcade Fire tour stopped by Red Rocks, really blew it, since both of these acts are worthy of headlining. After a vigorous set of pulse-pounding tracks from LCD that mesmerized the enthusiastic crowd, Arcade Fire took the stage and proceeded to all but burn the place to the ground with the sweeping grandeur of its majestic chamber folk.