SATURDAY: New York avant-jazz saxophonist Tim Berne brings his quintet Snakeoil to An die Musik Live in support of their new ECM release "You've Been Watching Me." Bay Area rap star IamSu! and rising Atlanta rapper Rome Fortune perform at Baltimore Soundstage. Nelly's Echo, led by singer-songwriter Nelson Emokpae, plays at Fishhead Cantina. The Short List's alma mater, Towson University, continues to disappoint its students when Krewella and G-Eazy headline this year's Tigerfest Concert at SECU Arena. There are release parties all over town for local groups tonight: Rap group Dirt Platoon celebrates a new album at the Windup Space, industrial band Mindless Faith releases a record at the Ottobar, and experimental duo Blacksage unveils an album at the Metro Gallery. Don't miss: The Charm City Folk and Bluegrass Festival will take over Druid Hill Park for a full day of performances from The Travelin' McCourys, Frank Solivan & Dirty Kitchen, Seldom Scene, Grand Ole Ditch, and The Bumper Jacksons with an after-party concert at the 8x10.