Join London #LeanCoffee by visiting http://www.meetup.com/Lean-Coffee-London/
Step 1: Find a venue and promote it so people turn up.
Step 2: Everyone proposes topics to discuss ... then spot votes on the ones that they want to talk about most.
Step 3: Discuss the most popular topic for 8 minutes, then vote if to continue for another 4 minutes or move onto next topic.
Step 4: Keep discussing until you run out of time.