Brainstorming: neat stuff we could do on LessWrong

Are there any community activities or rituals or experiments we could try?

Preferably things that don’t require special software.

As an example of the kind of thing I’m thinking of, Reddit has special “I Am A” posts (no, I don’t think we should have those), or things we already have, like Quotes or Open Threads or Diplomacy games.

(This is a complement to the previous post about which topics we would like to learn about here.)