Common sense is a thing, you know.
Do you mean, “we’re going to discuss Huck Finn and not worry about which words offend the sensibilities of liberals and be annoyed at those who want to prohibit certain words. We expect you to bring $10 for your share of the barbecue.”? Cause thats still kinda a code of conduct, its just a different one than the author would have.
(You have not explained what you mean by safe space and why you want your book club to be unsafe)