The Isis is a lovely little pub on the river near Iffley Village. You can't drive to it - access only on foot, bike or boat! Fantastic place, good food and beer (and cake!) and a really nice converted barn which makes a great gig venue.
We couldn't find a website for the Isis, but here is the Daily Info review page.
The Isis hosts a session on the second Friday of the month (liable to change occasionally) from 8pm. It's a song and tune session; starts off as mostly English folk but will descend in to cheesey pop by about 10pm..! Keep up to date with when the sessions are by joining the facebook group below.
Address: The Isis Farmhouse, Towing Path, Iffley, OX4 4EL