Historical version 5 of Charlton House (view current version)
Charlton House is a quaint 16th or 17th century (dont remember which) house in Charlton village (Zone 3, train from Charing Cross to Charlton or tube to North Greenwich and then various buses). Entry is free and the house houses the Charlton Library. Free broadband internet access available and less crowded than say Woolwich or other bigger libraries. Tea and biscuits served in the hall - they demand a meagre payment. Toilets in the premises. Not sure about baby changing rooms.