With little attention from the media, a number of soul performers who first came to prominence in the late ’60s and early ’70s continue to tour, regularly bringing their gospel-rooted vocals and choreographed dance moves to a largely African-American audience that has grown older with them. Tonight’s roster delivers a cross-section of R&B styles from those afro-and- bell-bottom days, with Tyrone Davis offering bluesy midtempo ballads, the Chi-Lites melancholy group soul, and Harold Melvin and the Bluenotes smooth Gamble-and-Huff-penned sounds. While none of these performers’ post-’70s releases have matched those of their glory years, an evening of nostalgia highlighting their best work should prove rewarding for both devoted fans and new discoverers of classic soul. At 7:30 p.m. at the Lincoln Theater, 1215 U St. NW. $18.50-32.50. (202) 328-6000. (Steve Kiviat)