Double Denim

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There's a party taking place and the dress code's double denim. Except it isn't, as the invites were not sent out, so the audience has arrived wrongly attired. It's only Michelle Brasier and Laura Frew, our hosts, who are in the required clothing – though it soon becomes clear that there's much more denim than "double" woud suggest.

This raucous late night show is for an up-for-it crowd, and a few drinks beforehand wouldn't hurt. Brasier and Frew's party is of the sort that teenagers throw to try and demonstrate their burgeoning wildness, and the humour comes from their misplaced performances of adult confidence. Much of this requires audience participation, with the two clambering over the stalls to include everyone. The high-energy humour is energetically delivered, as they attempt to maintain control of a party slowly turning into something they didn't plan. They're magnetic performers, capturing well how teenagers carry their bodies and attempt to be alluring. And there are thoughtful digs at the pressures on young women, hilariously captured in a piece of performance art that summarises the trials of puberty.

It's a shame then that all this doesn't quite build to a crescendo. A narrative about the non-arrival of guest stars is intended to shape the hour as a whole, but the build-up is not satisfyingly paid-off. And there's another, more gruesome ending, that is tonally out-of-kilter with what has preceded it, and seems to be there mainly so there's a reason to end. Perhaps it would have been better if they'd carried on partying.