CHANCE - in search LPThe popular American perception of Nashville has changed radically since 1966, when Charles Portis lovingly lampooned the citys ambitious, strenuously earnest musicians laboring out on the road and in the honky tonks night after lonesome night, singing their songs, some trash, some gold, about hearts and wrecks and teardrops. What hasnt changed is Nashvilles predilection for the fertile fringes. By fringe, we dont mean the variety found on Western