I think there are actually two US Airways Clubs in the Charlotte Airport, or I missed something. I bought a day pass since I was going to have a 3 hour layover. They had some simple breakfast out for general consumption - donuts and coffee, with more complicated food at a food counter. The best part of the lounge is the ability to kind of hide away and get some work done, although I always use my broadband so I don't know how the WiFi is.
My only complaint is that the line to just get in can take up to 15 minutes to get through. Seems like you should be able to scan your pass and go in.