What's exciting about Cyderdelic, the anarchist combo here to "smash capitalism and replace it with something nicer", is that their act grapples with a very modern phenomenon. Su, Beetle and Frogger are Devonshire crusties who have protested and broadcast against globalisation.
Their purposefully chaotic show unites song, video and propaganda as the boys bid to convert us from eco-worriers to eco-warriors. There's footage of them invading the Richard and Judy studio. And there's a droll puppet show in which 1980s Grange Hill character Zammo re-enacts his battle against drugs.
It's an interesting combination of activism and comedy, never more so than when Cyderdelic lead their audience out into Edinburgh, erect a roadblock and invite us to reclaim the streets. At such times the trio seem committed to the cause they're spoofing. But their performance veers troublingly between affectionate piss-take of the confused hippies on the fringes of the protest movement and reactionary lampoon of people who put their lives at risk for social justice.
It's easy for the media to characterise anti-capitalists as anarchist dimwits, and Cyderdelic's presence at the May Day demonstrations- shown on video here - reinforces the stereotype. The group's show is far more current and provocative than most fringe comedy, but its comic contribution to "defeating world poorism" is a sometimes counterproductive one.
Until August 27. Box office: 0131-556 6550.
