Sweet Grassmarket (Venue 18)
**
There is an authentic ring to the dialogue and interactions between patriarch Jonny, once a successful touring musician, his slightly tetchy son John and his laidback and plain-speaking teenage offspring Jack, with family friend Fisher acting as the good-natured go-between and comic relief. But there is little dramatic momentum or sense of purpose to the piece beyond a gentle journey into cosy nostalgia.
Until 20 August. Today 1:40pm.