Suggestions needed: good articles for a meetup discussion

The Chicago LW meetup group is looking to add a bit more structure to our discussions, which have been rather freeform to this point. What are some good articles that we could read in advance and then discuss at the meetup?

Some criteria that I think a good article would have:

  • LW-related topic

  • Relatively brief, so we will actually read it beforehand (a typical sequence post is probably a good target length)

  • Able to support/​spark enough good discussion to be a centerpiece of a meetup

  • Others?

We haven’t really done this before, so any suggestions or advice based on experiences at other meetups would be especially helpful (both specific articles that have worked well before, as well as best practices for having the best discussions).