Busy local schedule features roots rock, tribute bands and EDM By Denny Dyroff, Staff Writer, The Times Donegal-based Altan is fusing Irish folk music with American styles such as Bluegrass. Over the years, Longwood Gardens (Route 1, Kennett Square, 610-388-1000, www.longwoodgardens.org) has presented a wide array of musical acts from around the world and in a variety of genres. On February 26,...