Cepe I was thinking not primarily of Harry but of Cressida's family (what little has been made known about them in my viewing) as "cafe society". That was a term popular when her mum was a young fashionable famous woman. It figured prominently in descriptions of the social doings of the Duke and Duchess of Windsor. The phrase may be outdated in terms of Harry's present day activities but it is a background of Cressida's family, and pictures of them (mum and daughters) seem to indicate that type of life still in vogue.
Cressida may have a real brain on her, and not be a cafe society type at all. I was responding to another post about Harry needing a girl of strong character, and I guess such a person could indeed emerge from her family's life. From many sources come good things. She is certainly spectacularly beautiful, no wonder he is smitten, and a dance major at that...giving her a great "carriage".