Lean Coffee is a structured format for a completely crowdsourced discussion. Attendees suggest topics, stack rank them via a voting process, and then discuss each one in order, using short timeboxes until they reach consensus to move to the next one. We reconvene at the end of the session time to share takeaways. We tried Lean Coffee as an experiment at Seattle Code Camp 2016, focusing on topics of interest around women in tech, and the collaboration was fantastic! Here are the slides we used—setting the stage with principles from Open Space Technology and finishing with a Lean Coffee quick outline—so you can learn more and facilitate a session on your own.