A Beatles chorus bounces off the bare concrete walls of what was once J.P. Morgan’s headquarters. "Come together, right now." The nearly 1,000 chattering WeWork employees who fill the event space look toward the stage, expecting CEO Adam Neumann to appear from the wings any second now. Instead, he sprints down the center aisle, and giddy conversations evolve into a cheer. When John Lennon trills "Over me," Neumann leaps onto the stage, sticking the landing.