Pop-Ups, Ball Pits, Synths and Surprises – Why You Need to Check Out The Imagination Stage Alex KramerJuly 18, 2018 Denver's annual Underground Music Showcase is well-known for bringing a heap of amazing artists to Denver. They're doing it again this year with over 300 artist... 303 MagazineDenver MusicFeaturedMusicNeighborhoodsSouth Broadway / Baker2 min read