I have a trusty pair of gray pajama pants that I call my Grayboys. When it's cold I also have a flannel robe. However, if I'm too lazy to go out in anything more than PJ's, it's just the Grayboys, a pair of flip-flops, and a plain white T-Shirt or something. Of course, that was just back in college when I did this and it was only to class or maybe a quick midnight run to the store or something for some soap or ramen noodles. I don't do it anymore, really. Must be part of the whole "living back at home" thing. Now that my room has to be clean before I leave the house again, it's not really that much more trouble to shower and put on real pants.