Funny you should mention "jailhouse" - years ago, I wrote a pattern for my (now antique) Roland TR707 drum machine that had the open break as one variation, a fill-in for the transition and a third section for the shuffle part of the beat. It was great.
I played that song tonight on the psr2k, and found that out of the box, the Rock & Roll pattern works great - variation 1 is an open hi hat thing that's great for the intro (also Rock around the Clock) and variations 3&4 work terrific for the meat of the tune.
It's a kickin' little "house rock" shuffle that will work for thousands of jitterbugs.
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