Beloved Seattle institution KEXP will celebrate half a century on-air with musical performances, live broadcasting, food trucks, and more. The lineup will include dance punk heroes !!! (or Chk Chk Chk), British jazz ensemble Sons of Kemet, eclectic singer-songwriter Thao, synth-pop wiz Tomo Nakayama, vocal powerhouse LIVt, and "a special surprise guest." Best of all, it's free!