Cold War Kids played the area twice last weekend, Friday night at the Middle East Downstairs, and Saturday at Northampton’s Pearl Street Nightclub. Both shows sharply contrasted with the California-based indie rockers’ gig at Great Scott last fall, most notably in terms of the crowd. The Great Scott show felt like a house party, complete with technical glitches that the small-but-dedicated crowd, most of whom probably read about the band on an MP3 blog, or......