The booklet I have shows the following:

Singaround in the Crown on Friday evening from 8pm.

Musicians sessions from 10 - 12 and 3:30 onwards in Crown on Saturday.
Musicians sessions from 10 - 12 and 2:00 onwards in Crown on Sunday.
("Musicians are welcome to play at any other time, avoiding the 2 hours over Sunday lunch")

Singaround 1 - 3 in the Studio bar on Sunday.

That's most of the time isn't it? Apart from when you are seeing Linda and Hazel :)