The most relaxed, jovial, and ultimately productive environments I've been in have been ones in which people have a healthy sense of humour. If the basics like

The most relaxed, jovial, and ultimately productive environments I've been in have been ones in which people have a healthy sense of humour. If the basics like "don't be a racist dickhead" need to be codified to someone then they won't last long in most spaces anyway. People generally call that kind of thing out fairly quickly and distance themselves. Unless we're on 4chan.