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Either the Dropkick Murphys are a total anomaly in today’s music world, or I’m just not up on the Irish pub-punk scene. That’s not to say the Murphys are musically unique. It’s just that the Boston (natch) band’s combination of melodic ’77 punk, Pogues-style rabble-rousing shouts, and working-class politics is so far out of step with today’s sonic universe that it makes them sound singular. The Murphys are so thoroughly enwrapped in their sound and ideals that the loss of vocalist Mike McColgan harms the band nary a bit on its latest CD, The Gang’s All Here. Every song is still an invigorating shout over pedal-to-the-metal music that drives through your skull like a semi. The Dropkick Murphys reaffirm the power of three chords, solidarity, and a good pint at 7 p.m. at Nation, 1015 Half St. SE. $8. (202) 554-1500. (Christopher Porter)