Clan Rumpus Room

The Clan Gym is a place where members of a clan can go to excercise and train. There are three pieces of training equipment you can find in the clan gym, each costs 30,000 meat from the Clan Coffer to purchase:
Hobo-Flex (Muscle)
Big Book of Magicalness (Mysticality)
Tan-U-Lots (Moxie)
You can spend as many adventures you like (up to a maximum of however many you have) at any of these machines, and they will give you stats dependant on your level without costing you meat - 1 stat point per adventure per level (including partial levels - eg if you're halfway towards getting to level 10 you'll get 9.5 stat points per adventure).
It is worth noting that, among the huge number of things available to do in the kingdom, this is one of a very small number you can do while drunk.