Sessions are most likely going to be at the Manor, the Swan and the Cross Pipes.

All 3 pubs have outside areas and plenty of room.

The Red Lion (where there were also sessions) has closed.

There are some 'official' sessions planned - I know of a Bluegrass session that is in the Cross Pipes on Saturday afternoon from around 4pm. I know the people leading it - it will probably be more appalachian / american style music rather than strictly bluegrass.
The Cross Pipes also has a late licence on Saturday.

Snozz