Musicians have certain nightclubs and concert halls where they love to play. Sometimes it’s the look, the feel and the history. But what’s even more essential is the sound. WKSU’s Kabir Bhatia finds out more in this week’s “Shuffle.” Groups like Bruce Springsteen & the E Street Band , The Cars and Badfinger loved Cleveland’s old Agora . The dark, crowded, low-ceilinged club was once one of the most famous music venues in Northeast Ohio. But the Agora burned down in 1984. Twenty years later,