Ping-pong tables, latte machines and other neat frills don't attract millennials as much as companies like to think, according to Melissa Louis, managing consultant at The Gallup Organization, which has done massive surveys in this area. "The biggest thing millennials really care about is development," she says. "Are they going to be in an organization where they will be consistently coached, where they can see a path for themselves in the future, regardless of what role they're starting in?