I just arrived in Pittsburgh, unexpectedly, fleeing Hurricane Irene. I checked into my hotel, and I decided to hit up a drop-in yoga class in Shadyside. When I arrived on Walnut Street, much to my delight, I found myself in the middle of «Shadyside…The Art Festival.» The street was filled with tents featuring local artists, the sidewalks were lined with fresh lemonade stands and barbeque carts, and there were cool people everywhere. The best way to spend an evening.