Here's what's going on Friday in Chestnut Hill and Mt. Airy. Benefit Concert:There will be a benefit concert on Friday at 7 p.m. at the Mt. Airy Train Station located at 7423 Devon St. Phillip Bennett is a fine singer/songwriter with a beautiful tenor voice. He is backed by Jim McKay on guitar and Harry Gould on bass and will present an evening of his original songs as well as covers. Donations will benefit the Jubilee School in West Philadelphia. As always, bring lawn chairs, blankets, your kids, your dog, and your friends for a mellow night of music under the stars. Rain date is Saturday October 5 same time and place. Call 215-242-0854 or go to WalkaCrookedMileBooks.com for more information.