On stages throughout the area, J.B. Kline is celebrated for his virtuoso guitar chops and his blues, R&B and acoustic performances. Lambertville’s native son and bard is also an accessible, warm neighbor and teacher, whether at his music store at 25 Bridge Street or on the sidewalks of the City. He recently released his fourth album, “Makin’ the Deal Go Down,” so we talked to him about his heritage and inspiration.