Roberta Flack’s D.C. legacy
Before Roberta Flack became an internationally renowned, chart-topping music icon, she was already making indelible footprints in Washington, D.C., both as a public-school choir teacher and an aspiring singer and pianist. It was in D.C.’s classrooms and especially its small nightclubs that Flack — who died in February at 88 — established the disarmingly personal…