The first thirty seconds of this video are wonderful.  It looks as if it’s a party in someone’s living-room, with a juke-box… apparently for posh people – notice the bow ties – but taken over for a few seconds by the mods in the room.

This didn’t ever happen at the Corn Exchange in Chelmsford, but I remember something like this in 1965 when the girls’ High School had a dance.  The boys from the Grammar School came and as the first notes of a good record like this started, the mods among them moved onto the floor in a group, followed by the High School girl mods, and they danced – the Block or the Bang – a mod dance.