“We believe that we are completely, straightforwardly a jazz band,” says bassist Matthew “Moppa” Elliott. “With no qualifications at all.” Why is this a question? Well, listent to any of the four studio albums by Elliott’s genius group with the oddball name Mostly Other People Do the Killing, or witness their kinetic, eccentric stage show, and you’ll understand why, in the nine years this New York quartet has plied its craft, queries have arisen. The group plays the Institute of Contemporary Art on Sept. 27.
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