SamyaUK,

First of All- how big is this shop?  I am sure food store are a plenty.  If you have a place big enough, you should have a book section with table and chairs for people to browse (like Chapters) a coffee shop( in the center and an internet shop.   These three go well together.  If you can still manage then think of compiling second hand books and starting a reading library in one corner of the book store.