Commentary PITTSBURGH—Years ago, there was an urban arcade called The Bank located here within a series of five old buildings that once housed financial offices in the Gilded Age. Connected internally by a savvy developer, 145,000 square feet of abandoned former grandeur was turned into a series of high-end shops, bars, a bookstore located in a former bank vault and a disco simply called The Library. It was the late 1970s, and discos were everywhere. This one attempted to set itself apart with a little pretense, a proper dress code: jackets, ties, and no jeans for the men; women mostly wore suits during the week; and the high-end fashion came out on the weekend. The books that lined the place and the more sophisticated music selection were an attempt to imply this was a more intellectual crowd than the one attending the 2001 disco across the river, or the Rusty …