The Andrew Lloyd Webber musical Hooper’s film adapts has always been a bizarre creature of the ’80s — music and lyrics heavily inspired by a collection of T.S. Eliot poems, structured around an idea that’s referred to by some generous people as the show’s “plot.”

What do you get when you cross Pittsburgh’s annual furry convention with an uninspiring cohort of vain and vacuous celebrities? Tom Hooper’s new “Cats” movie.