Fakefan

Things for Mark to do We also have page Fake Fan

Someone who doesn't read or feel any particular attraction to science fiction but who enjoys the company of fans and fandom's social order and whose company is enjoyed by fans. If used to describe someone who is a fan in the traditional sense, it's a pejorative, and some overly serious stuffed shirts use it as a pejorative all the time, but otherwise it is used as a synonym for a "fannish type" of person, which is (or should be) regarded as an intended compliment.

Harry Warner describes a fakefan as "one with no basic interest in fandom but with a pleasure in the company of fans" and says that Jack Wiedenbeck was the first fakefan.