Just got back from Giant eagle in squirrel hill... the parking lot is amazing... the cart returns have no bars under them or across the back, so you can practice underbars or do pullups / muscleups, There are two verticle walls about 9 or 10 feet high, there's a third one further back right by a staircase with a metal rail... and if you go at 2 in the morning like me, they're closed, so it's as close to secluded as you're going to get. This place is perfect for beginners or intermediates. there's also a few walls that are waist to chest height, planters, etc. If anyone wants to meet up, i'd say that's as good as oakland but probably safer.