If you are in the military, you have probably visited the special lounges at the airports close to your base on your way to or from deployment. But did you know that you can use dozens of such lounges across the country while on a personal trip with your family?

Those so-called airport centers are operated by the United Services Organization (USO), a private, nonprofit group whose mission is “to support the troops by providing morale, welfare and recreation-type services to our men and women in uniform.” I’ve written about airline business lounges before, and like most frequent fliers, I can hardly imagine travel without the oasis they provide in crowded terminals. I had no idea, however, that there were military lounges…