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Fellow travelers of Waco Brother Jon Langford, Missouri’s Bottle Rockets budget themselves one song per album that’ll stir up the good old boys: On their debut, they challenged the Stars and Bars; on their latest, they stand up for welfare mothers. The rest of the time, this quartet plays respectable good old boy music. Cravin’ Dogs open at 8 p.m. at the Barns of Wolf Trap, 1624 Trap Rd., Vienna. $12. (703) 938-2404. (Mark Jenkins)