In Maine, a "Rinktum" has come to mean a party of folksingers. When I first met my supervisor in the Warden Service back in the late 50's, he used that word to mean getting called on the carpet for screwing up somehow. I remember when the Explorer sunk he and I were on our way to Augusta to explain what happened, and he said "I'm getting too old for these jeezly rinktums.
Next weekend I'm off to New Brunswick to have a party with a gang of folkies. That is the annual summer rinktum. In February, we have another one in Belfast Maine called the winter rinktum. Both are invitation only as space is limited.
Now you know.