One more from Vegas

I grew up on White Castle hamburgers.  I remember my Dad driving us into St. Louis to get a bag of burgers.  Nothing better than a half dozen or so burgers with horseradish mustard.  We don't have them in Texas, but since my last trip they opened one in Las Vegas.  It was a must to stop there.  I would have brought some back on the plane but I didn't want everyone asking what the smell was, because the smell is so good.