One of the fun things about a made up society is rituals that PC have to try to memorize or at least understand the significance of to fit in or not step on toes. I'm trying to come up with some for a culture I'm working on. What cool customs/rituals have you seen/read about in real societies or games. I'll give some examples of ones that I've used.
Russian drinking rituals are a lot of fun for games and have a lot of odd quirks. A toast is said and then you are expected to down a coffee cup sized portion of vodka. There's a lot more to it but that would be a post in itself.
Strong ideas about if things are done in public or private. For instance it might not be considered acceptable to buy or sell in private. There are obvious inversions of what we might consider polite in a different culture. Things like belching at a meal. This could be taken to different lengths purposely trying to trip the players ideas of what is appropriate.
How do you knock on a door if there is no door? How do you say I need to talk to you to someone in a private place? Native Americans that lived in tents (Tee pees). I read somewhere (memory is fuzzy this was a long time ago) that it was rude to just shout to the person you wanted to talk to so you would go over to the tent and scuff your feet on the ground. It was usually loud enough to get their attention.
Japan, China, and India are oft replicated in fiction for their customs.
What are cool ideas that you've used or would like to use in games?