The 20th Annual Keystone Sacred Harp Convention, January 2018 – Hotel and AirBnB Information Chestnut Hill Hotel. 8229 Germantown Avenue, Philadelphia, PA 19118. 215-242-5905. Upscale boutique hotel in lovely Chestnut Hill, less than three miles from singing venues by car or route 23 bus. Hotels on City Avenue – about 4 miles to the singing…