Presented by the University of Denver Programming Board and ThisSongIsSick.com, Swedish House Mafia mainstay Sebastian Ingrosso headlines at GLOWfest with his protégé Otto Knows in tow. Ingrosso spins a thick mix of unstoppable jams, weaving heavy, pulsing beats into MGMT's "Kids" and his own "Laktos" to create rolling waves of sound and bodies. Otto Knows heats up the crowd before hand, having exploded onto the scene with a touching mix of Imogen Heap's "Hide and Seek," followed up with the rousing anthem "Million Voices." Juggernaut party animal Kap Slap flies in from his Philadelphia frat to drop his chop-happy jams with an emphasis on sultry, sinuous female vocals, and Colorado's own Hujje builds surprising structures from simple loops, like an architect recreating the Eiffel Tower out of hula-hoops. Crisp and clean, GLOWfest highlights the immaculate production and endless positivity that characterizes progressive house music.