In stand up comedy, an open mic is a place that is open to amateurs. A place to experiment with material. A place to babble.
Currently, on LessWrong, personal blog posts, open threads, and shortforms are all places where you are invited to babble. However, I get the impression that there is a culture of not doing so. So then, as an experiment, I'm creating this post. It's intended to be basically the same thing as the open threads, but more babble-y.