Actually you don't have to be member or insider of any particular social group to attend most of them. It's really just register, send the money and you can go.

Actually you don't have to be member or insider of any particular social group to attend most of them. It's really just register, send the money and you can go. Regarding terminology, I struggled with that too, to explain to my american coworkers. I think "puzzle hunt" is probably the best translation of Czech original term "šifrovačka" or "šifrovací hra" (which would precisely mean "cipher game"). I have never participated in a scavenger hunt but my understanding is that it's a slightly different game.