you should allocate some time to free-experimentation. When you discover that one activity was clearly better than another, you can change to the better one. Until then (and even after) having time to experiment (try new things) is valuable in itself.
the advantage of taking LW participants swing dancing (for example) is that you get to swing dance AND spend time with LW friends at once. (being more efficient than just doing one or the other)
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.