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Stinking Lizaveta treads improbably in the murky, murky water at the confluence of jazz and metal. The Philly trio’s frantic, improv-heavy instrumentals dive in and out of that muck with rigorous aplomb and muddy intensity, driven by flailing drummer Cheshire Augusta’s steady pounding. Alexi Papadopoulos wraps himself around a homemade upright electric bass to embellish Augusta’s rhythmic styling, and his brother Yanni Papadopoulos trounces all over it with mean guitar licks and flighty fretboard grace notes. At its best, Stinking Lizaveta induces both fist-in-air rock headbanging and the finger-snapping head-bop of lucid jazz experiments. But even at the slow points, the band’s dark and plodding moodscapes are intriguing. Live, the trio tends to play extremely loud, scrapping musical structure altogether in favor of free-form heavy-metal thunder. With Trainwreck and the Comedians at 8:30 p.m. at the Black Cat, 1831 14th St. NW. $7. (202) 667-7960. (Colin Bane)