Robb Myer was excited when, as an MBA student at Carnegie Mellon in 2005, he heard that Google (GOOG) was opening an office on campus. Nine years later, Google has almost 400 employees working in Pittsburgh’s rapidly gentrifying East Liberty neighborhood and plans to take two floors in a tower under construction. Myer went on to found app maker NoWait and is no longer thrilled to have a tech titan for a neighbor.