By Denny Dyroff, Entertainment Editor, The Times Walk down any street and turn any corner and you’re likely to find a Halloween event over the next three weekends. The Chester County History Center (225 North High Street, West Chester, mycchc.org) is presenting two Halloween flavored walking tours this weekend. On October 17, it will be “Plagues and Pestilence: A Walking Tour” at 6 p.m. In...