Lately it seems like there has been, thanks to Chris Davis, a steady trickle of the best younger jazz players from Chicago making their way through town: Keefe Jackson and Josh Berman, then Mandarin Movie with Frank Rosaly and Jason Ajemian. Now bass player Ajemian is back with the trio Dragons 1976, which also includes Aram Shelton, another one of the sax players you hear about these days, and percussionist Tim Daisy, who among other things is the drummer in the Ken Vandermark 5. This show, like Mandarin Movie, is at Ruby Green this Sunday (July 2). Starts at 9:00. Hands Off Cuba is also on the bill, and another Nashville group called the Potato Battery Experiment. I'm not sure who that is.