At ORD:

You'll have access to the "Global Services" checkin area - a separate room (Yes, room) inside Terminal 1, all the way to the left, beyond the Premium security lanes.

Inside there, a very nice well-trained person will check you in and then you'll get to go through a special door that lets you bypass the security line - you still go through security, but skip the waiting line.

From there, your plane will almost certainly leave from the C concourse, right when you come up the escalator to the C gates walk STRAIGHT and left a little circling behind the customer service desks. You'll see a door to the Global First Lounge. Inside you'll find a full buffet, complimentary beverages, including some fairly nice wines, and the ability to order off a menu.

If you're lucky, when it comes time to board someone will fetch you and walk you to the gate and whisk you around all the barriers and right onto the plane.