"It's Muppets-level joie de vivre, bodies sailing over shoulders, legs flailing, hands held aloft in triangles. It’s smart. It’s funky. And it really rocks." Viral sensations Angine de Poitrine dazzle, confuse and delight at debut London show

Angine de Poitrine .

Every inch of the Ballroom – from which one might catch a glimpse of the stage – is packed. People stand on chairs. Black 'n' white spotted outfits mingle with Mastodon, Rush, NIN, Faith No More T-shirts and freshly purchased merch. There are older fans, young(ish) fans, 6Music dads, Louis Theroux at the back in a beanie hat, what looks like Justin Hawkins…

A reserved, chin-strokey response had seemed likely, at this hottest of newly viral yet cerebral alt rock tickets. What we’ll actually see tonight is giddiness, dancing, crowd-surfers, a circle pit… And everyone eagerly raising the triangular salute of our extra-terrestrial headliners.