This weekend I took some time to read up on the Stronghold system in BECMI/OD&D since I have never actually seen it in action. My 'aha!' moment was when I realized that it is basically the same thing as Carousing- a system to convert gold into XP, New powers, and generate interesting situations.
The only difference between them is scale in both money and time required. -And for me, there is a clearer narrative around strongholds… Part of my problem grasping Carousing has been that the closest equivalent I can imagine is a Chore list. But I suppose now thinking of it as a mini-stronghold kind of thing, there are a lot of other possibilities.