I was off my tree one day walking around in Sydney, and was approached by a Scientologist. He made the offer of a free IQ test, and I was feeling like I was up for some novelty and amusement, so I went with him to their headquarters and did the test.
I'll leave out the funny details of that little adventure, and get to the interesting bit. I accepted their offer of a free 3-day communications course. I think that maybe I could find a copy of the course book if I put my mind to it, and sometimes think I might, because it was really interesting. I learned some fundamental and useful skills.
I didn't continue with any other stuff, although years later I did an auditing session to see what that was all about. Interesting, but IMO scamboogery. It is a way for the Organisation to profile its members in detail. And I received hundreds of letters over a decade or so, despite moving house heaps of times ... that's what 'secret societies ' can do - they have members in all sorts of government departments etc to access all kinds of 'private ' records.
Anyway, I digress. The point is, if you can find the coursebook for the 3-day communications course, check it out. It's cool. Lots of interesting games to play.