If you get a chance and want to try something crazy try to visit their Celebrity Center in LA.
We were bored visiting some friends at Caltech and decided to do it. It was probably 10-15 years ago. We made up fake names, addresses, history, background story. When we got there they made us watch their recruitment video. But then the tour was pretty nice.
Even just seeing the people hanging around there, listen to the absolute batshit crazy worldview. Yeah the people seemed just a bit off -- spoke just a bit too slow and seemed a bit too robotic. Enjoyed seeing the architecture of the building, the explanations about how Ron Hubbard is going to come back from Saturn (or is it Neptune) and so they his office ready. Saw the saunas downstairs, where they supposedly "detoxify" people. The one sad thing there was a little old Korean lady. She didn't seem to speak English well and looked confused as they were telling her she needed to go back into the sauna. But then the best part, when night fell we got to go to the top level (or maybe the roof?) -- it was pretty nice view of the city.
The trick is to of course not give your disbelief away and don't act mean or condescending. We pretended to be ignorant young people who "heard good things" and just nodded and smiled. One of us couldn't resist making a sarcastic commit, we had to signal him to cut if off as he could have gotten us kicked out too early.