Given the calibre of both of the Boston five-piece's albums - their debut Manners and this year's Gossamer - we should be in a much bigger venue for tonight. Instead, it's at the Kentish Town Forum where one of indie's most underrated bands play to a, ahem, cult following.
Not that singer/keyboardist Michael Angelakos appears ruffled, leaping through first song (and Tune of 2012) 'Take a Walk' like a sugar-rushed Bash Street Kid; he's got his shirt tucked out of his pants and everything.
It's almost wrong that he's making so much merry skipping across the stage when his fellow bandmates are near-motionless behind. They've seemingly retaliated, however, by bleeping and blopping over Angelakos's high squeaking; it's actually frustrating how muffled his vocals are.
'It's Not My Fault, I'm Happy' at least is a fearsome outburst of walking-on-air electro squishes and chanting from the crowd; Passion Pit's fighting talk feels holy (in a good way) when it's wailed back to them by all in here. 'Constant Conversations' is also a magical few minutes.
But there are points when the band's absence from bigger circles is more forgivable; a good few of the album tracks come off weary and the melodrama before us can get trying after 40 minutes in - it's like Christmas Day when the presents have already been unwrapped.
Then comes 'I'll Be Alright' and its manic episodic, synths-eeeking fanciness; it's proper wondrous. And then comes first ever single 'Sleepyhead' which, by means of gold confetti and a rallying audience, is by far the best moment of the night.
An encore is simply unnecessary after an ending like that, but they do one anyway ('Moth's Wings' and 'Little Secrets' round us off). When tonight was good, it was good, but the unconverted should try the albums first.
Watch the Passion Pit 'Take a Walk' video below: