At first it was annoying because we lost focus and then we decided it was better and ended up being good discussions in two groups as long as we compared notes after between the groups.
Helsinki meetups have had a habit of explicitly breaking people into small groups (of about three people), letting them discuss the current topic for a while, and then breaking up and re-forming new groups so that everyone ends up talking to people they didn't talk with in the previous round. Repeat this until out of time.
Seems to work okay and is also useful in making sure that the quieter/less assertive people also have a chance to speak. I like to imagine it also helps reduce groupthink, if we ever were in a situation where that was relevant, because a person who proposes an idea in one group won't get to spread their idea to other groups until before the people in the other groups have already considered different ideas.
We've been running regular, well-attended Less Wrong meetups in London for a few years now, (and irregular, badly-attended ones for even longer than that). In this time, I'd like to think we've learned a few things about having good conversations, but there are probably plenty of areas where we could make gains. Given the number of Less Wrong meetups around the world, it's worth attempting some sort of meetup cross-pollination. It's possible that we've all been solving each other's problems. It's also good to have a central location to make observations and queries about topics of interest, and it's likely people have such observations and queries on this topic.
So, what have you learned from attending or running Less Wrong meetups? Here are a few questions to get the ball rolling:
If you have other specific questions you'd like answered, you're encouraged to ask them in comments. Any other observations, anecdotes or suggestions on this general topic are also welcome and encouraged.