Now this is everything we go to comedy to avoid: a brightly lit boardroom, niggles with the boss, the bogus bonhomie of workmate banter, the horror of writing a funny message on somebody's birthday card.

This site-specific comedy show gives a delectably novel spin on office life. The audience is led from the Pleasance to an anonymous business centre, where we sit round an oval meeting table with the testy boss, Trevor, his alarmingly dreamy sidekick, Michael, and the disaffected IT man, Gabriel. Played by the sketch trio House of Windsor - Joe Thomas, Jonny Sweet and Simon Bird- they offer up observational and absurdist moments with the same furrowed brows.

We pass around a get-well-soon card, someone's divorce papers and a memo about this unidentified company's plans to make “beings of infinite height and weight”. Trevor, according to the e-mail correspondence, has had a man killed. Kookoo Michael outlines an outlandish plan to buy sleep from poor Indians to sell to busy Westerners while at the same time wondering where his blue and white mug from home has gone.

It is one hell of a set-up, so it's only a shame that the trio don't quite know where to go with it. We get a series of increasingly bizarre variations on business life but, like a real meeting, it's could do its job in half the time. Having co-opted us as their delegates, they don't really use the audience in the show. But you'll forgive that for the novelty of the staging and the trio's commitment to the pretence, right down to the way that they storm out of the boardroom without pausing for anything so unbusinesslike as a curtain call.

Box office: 0131-556 6550