LANGHORNE SLIM & THE LAW Slim’s everyman crooning, never overpowered by his guitar or the accompanying comrades, is a fine showcase of a confident folk-rock tenor. His words tell tales, coaxed further with musical shadings of blues, gospel and American roots. He’s no slacker when plucking the acoustic guitar, either. Quite simply, Langhorne Slim is an upper rung roots singer and songwriter. Jon Lindsay will open. $12/$15. Visulite Theatre.