Another highlight from Wednesday night’s excellent offerings on the Festival’s outdoor stages: Slavic Soul Party. With a brass band, accordion, clarinet, and Balkan-style polkas and riffs the packed crowd at the TD Banknorth Stage never had a chance to catch their breath between tunes. They didn’t seem to mind. There was dancing on the park benches and cement walls bordering the stage, and a determined group of line dancers at stage left who had the right moves for this very high-energy contemporized folk/dance music. Slavic Soul Party had a really smoking sound!