My spouse and I have been running LessWrong meetups in two different cities for the past six years. Over time, we've gotten lazier and lazier about organizing, while still maintaining similar results, mostly by coming up with a bunch of simple recipes and scripts for running meetups. Here I have documented how we do it in excruciating detail, so others can use what we do.
Nope, that is not right.
Our schedule is weighted towards doing things that are simpler and have good replay value. We do board games and projects each once every 5 weeks, Group Debugging a little less often than that, and mix the remaining meetups in semi-arbitrarily, at a frequency of once every couple months for each type.
We do almost no explicit rationality content at all. Only reading discussion meetups could be described as that, and we do them very rarely.
People talk amongst themselves about whatever they want. Usually the structured portion of the meetup is about 1/3 of the total time, and the rest is just general conversation. There's a fair amount of it that ends up being related to rationality inside baseball, but it depends on who shows up and what they're thinking about on a given week.