FIDLAR @ O2 Ritz, Manchester, 19 Jul

There's a tell-tale sign of when a band has truly earned the right to be mislabelled as 'slacker rock.' It's when you realise that their shows are almost exclusively populated by kids who are clearly trying to approximate their heroes' look. Mac DeMarco's gigs are full of kids in caps and knackered jeans. Five-sizes-too-big T-shirts are de rigeur at Ty Segall concerts. It must be weird for Nathan Williams of Wavves to look out and see so many mini-mes every night.

FIDLAR fit into that bracket, too; a band who tour far too hard to truly be slackers, but whose songs – inspired by and reverential of cheap beer, cheaper tacos and a laid-back lifestyle – certainly suit the aesthetic.

That said, there's nothing laissez-faire about the crowd's attitude tonight. From the moment the LA outfit tear into frantic opener Alcohol, the Ritz's famously spongy dancefloor is put under dramatic strain, the whole crowd bouncing in tandem. By the time they segue from the scintillating pop punk – emphasis on punk – of Stoked and Broke into the noisy squall of Drone, mosh pits are erupting left and right.

This is a band with a razor-sharp ear for a hook and at their best, they're irresistible – West Coast and Why Generation are fizzing cases in point. By the end of the main set, though, it’s threatening to sound like much of a muchness – an epic take on the explosive Cocaine rescues the encore. Album number three is in the works and on this evidence, we shouldn't expect FIDLAR to break the mould – not that their boundlessly energetic fans will care.