Very doable. 1h20min on the train and often less than £20 return (if booked early). Easy walk from the train station passing loads of pubs and restaurants (and Chinatown) and Premiership football (although Newcastle havenít been too impressive in recent years).
Also matches are very well priced, less than the cost of a derby game for the majority of the home fixtures.
My gran lived next to the stadium most of her life, my mum grew up there, and I spent a lot of school holidays there, so itís pretty much in my blood.