Anne of Green Gables, contemporary romance novels, -- Upbeat coffee shop. James Taylor's Greatest Hits, The Carpenters, The Weepies, Shawn Mullins
High fantasy, historical fiction -- something interesting, but instrumental. classical guitar, movie soundtracks, cello solos.
Jane Austen -- classical piano
British detective fiction -- Celtic music (of course! I never said I was all that original), minor-key coffee shop.