The Black Ensemble Theater has made an industry out of African-American showbiz sagas, and Mama Said There’ll Be Days Like This is the latest, celebrating girl groups of the 1950s and 1960s—you know, before the Supremes—the Shirelles, the Chiffons, the Crystals, Martha and the Vandellas. You get a big musical bang for your $32.50 at the Black Ensemble, with elaborate costumes and faithful musical impressions. This world premiere is written by Marsha Estell, directed by Ilesa Duncan, with musical direction by Jimmy Tillman (which guarantees a band that cooks). (773) 769-4451; open run.