The Pack Saddle, Mappledurham

The Pack Saddle is a really lovely pub, inside and out. it is open all the time, from 11 am - 11 pm. It is along the A4074, the road from Wallingford to Reading which you can find on this map.
Their website. 
There is a playground nearby, in Mappledurham itself, as well as Caversham gardens. Both are further down the hill nearer to Reading itself.