By Denny Dyroff, Entertainment Editor, The Times Quinn Sullivan Two music acts sharing the bill at Elkton Music Hall (107 North Street, Elkton, Md., www.elktonmusichall.com) on March 1 are no strangers to area music fans. The Gretchen Emery Band has played many venues around the area including Kennett Flash, Jamey’s House of Music, Stoney’s English Pub and Bellefonte Cafe Massachusetts native Quinn...