Summer festivals have often had other performers alongside the music.
Now dance is joining the bill. Alongside Franz Ferdinand and Sigur Ros, this weekend's Latitude Festival will show hip-hop, Indian classical dance and work by Wayne McGregor, resident choreographer at the Royal Ballet.
At least the dancers should be away from any mud. At Latitude, most of the dance performances will be on a stage in a lake. Today's final rehearsals will include assessments of damp, mosquitoes and lights bouncing off the water. Technicians are standing by with mops, to keep the stage dry.