For years now, the local ensemble Harmonia has played the traditional folk music of eastern Europe that reflects the cultures of this region (think Hungarian, Slovak, Ukrainian, Romanian, Croatian and Gypsy). The musicians in the band come from varied East European backgrounds, and they explore those traditions in their music. The band performs tonight at 7:30 at the Happy Days Lodge. The concert is part of the Cuyahoga Valley National Park Concert Series. Tickets are $21. (Niesel)