I was there! Kinda. Almost. Back before the printing press, when I was in my late teens, I was approached by someone selling some sort of pirate newspaper. I struck up a conversation with the person and was led to 46 Beacon Street, where I voluntarily (I know, I was a chump then) took a "personality" test and then was invited to free food and to take some kind of biofeedback test, both of which I passed upon. I looked up the address just now and they claim it was run by "est" then, but I clearly remember the newspaper mentioning scientology. To its benefit, the publication was the first time I encountered a mention of "BZ", which the paper claimed was buried at some army base but now presented a problem as there was no way to excavate it without affecting hundreds of thousands of people.