I quite loved visiting the Eagle and Child, myself. Their spiced cider was quite good, but I've a feeling that is only available during the Christmas season.
The University has some Lewis related stuff, if I remember correctly. It was a bit of a whirlwind when I was there, as I was visiting a friend, her mum was also arriving, and I was moving out of the continent less than a week later.

The Kilns, Lewis' home, is also nearby, if I recall correctly? I think they've turned it into a museum, but I haven't been able to go in.
Fun facts, wagga! It would be cool to have a calendar of those sorts of things for the Inklings.