Across a bunch of scientist biographies, I noticed that a lot of scientists were part of a club to discuss science. It's usually something mostly informal that meets about once a month. Some scientists that I know were part of such clubs and developed ideas there are Norbert Weiner, Ramon y Cahal, Alan Turing, Pyotr Kapitsa, among others. Counting down to the new year, I'll be posting about the societies that have fascinated me.