Wait a minute - you said no rules, but there's that rule about the food.

It's not really a rule, because if the Great Penguin drops by and you don't have any food to offer to Her, She might be a bit disappointed, not to mention a little hungry, but She won't do anything mean to you. You won't have to quit the church or do any weird rituals. (In fact, if you are really in dire straits, She might regurgitate a semi-digested Cosmic Herring for you! But that may not be something you want.)