One of the most beloved and influential institutions in the history of local independent music, Teenbeat Records marked its 26th anniversary on Saturday night with a concert at the Black Cat that showcased four of the best bands in its stable: Unrest, Versus, The Rondelles, and Bossanova. Founded by Mark Robinson and friends at Arlington’s Wakefield High School, the label is now based in Cambridge, Massachusetts — but its DIY ethos and sonic signatures remain…

Our occasional series, “Secret History,” features profiles of classic D.C. albums as a way of looking back at the District’s contributions to music over time. This installment finds DCist reminiscing over Unrest’s final LP, Perfect Teeth (Teenbeat/4AD, 1993). In a lot of ways, Unrest were the epitome of the best aspects of D.C.’s indie rock culture of the ‘80s and ‘90s. Smart, excitable kids with good ideas and boundless enthusiasm, ambitious without any concrete…