Two floor seats for the 'Strokes' at the Agganis Arena on Tuesday, April 25. The epitome of cool: That's the angle The Strokes approached in 2001, flaunting bed-head hair, fashionista scores from vintage stores, and a stone-faced, detached ('Care? Us?') attitude for a scene sorely needing young rock 'n' saviors. Their style has evolved in the five years since, but their sound remains instantly recognizable--a Lower East Side history lesson of post-punk and new wave tones projected onto a pop sensibility that screams single potential as it exudes the essence of the tragically hip.