Last Friday, a crowd of urban cyclist gathered at dusk in Dufferin Grove Park for the second annual Bike Pirates Bike Rave. Over the next hour or so, the scene would turn technicolour as darkness set and the riders various lights and glow sticks punctuated the night with shining rainbow streaks. Soon the troupe set off into the city, multiple stereos playing electronic tracks that suited the animated lights near perfectly.

How does a bike rave work? It's pretty simple, actually. After the riders deck out their bikes (and sometimes bodies) with all manner of lights and glow sticks, A communal playlist is prepared for the event, which everyone who has a stereo starts at the same time. Preparations made, the riders then take to the streets en mass. Voila! You have a moving, pedal-powered dance party.

Here are 20 highlights from this year's Bike Pirates DIY Bike Rave.

Photos by Jesse Milns