Who: Passion Pit

Where and when: 6.40pm, Saturday, John Peel stage

Dress code: Sweaty T-shirts and jeans that look like they could do with a wash. Like an indie band, then.

What happened: Boston's Passion Pit, a bunch of geeky looking chaps with a taste for synths and an ear for a melody, turned an initially hesitant crowd into a jolly mob. Standing side-on to the stage and not saying a great deal, singer Michael Angelakos combined bouncing around with his endearing indie falsetto, and came off rather charming with it. His big mop of curly hair even looked like it was enjoying itself. This was their first time at the festival and the Bay Staters seemed determined to fulfil the praise heaped upon them before the gig – opening with an uptempo version of Better Things, before selecting the wheat from their debut record Manners.

Who's watching: A John Peel tent full of people determined to dance. Plus just as many people loafing on the grass outside and peering in.

High point: The delirious Sleepyhead. Like MGMT, who played the same slot last year, they had the crowd singing the guitar/synth line.

Low point: It's a good song, but no set list should include a track called Cuddle Fuddle. Bleurgh.

In a tweet: Precision Prozac pop from Passion Pit.