IIRC, the "local people" who owned the School House was Mario Medici, who also owned Medici's in South Plainfield. I worked at the School House as a dishwasher and busboy when it was growing, and remember Rivendel playing Thursday nights. I lived a half mile from it and went to Wurlitzers as a main staple in our partying diet--that place was the most wall-to-wall human compression I have ever been a part of, and that includes the Melody. The women were hot, getting a drink from the bar was quite the battle.
As for the Jug House, I remember it well, though I rarely went there. It was razed about 15 years ago. The Sittin' Bull is gone, too.
But the RRT lives on!!!! River Road Tavern