So this might be a bit more of a fantasy suggestion but what about a Guild of Dungeonering, as a member of the guild you can go out on adventures in lost ruins, darkest dungeons, and creepy caves. These expeditions will be dangerous which is why the higher ranked you become into the guild the more likely chumps will do the job for you.
While I can think of some things to do with this idea, it would pretty much revolve around long quest chains upon more quest chains. The higher ranks unlocking more quest locations and so on. These missions would last several days or weeks tho, which would require me to find a way to put your kingdom on regency for obvious reasons. The biggest issue would be writing the hundreds of events, I don't think I'll have the sanity to make enough of these to fill a whole society with it. Perhaps I could make a modular one later for the 4 Fighters Guilds that branch into several random paths as you go, making each run mostly unique. And perhaps the Holy Orders would have one too, about finding religious artifacts or something.
In any case, it is an idea I'll explore for the societies I am currently working on. But it is not a priority and I won't work on it until much later.