Margaret Glaspy’s efficient, modest folk-rock sound is strong enough to land the singer-songwriter and guitarist a headlining spot in the Mainroom. She has a band, but she can be even better without them, singing with explosive passion over raw, bluesy picking and strumming. In February, she followed her excellent 2016 debut album, Emotions and Math, with the three-song Born Yesterday EP. With Big Thief guitarist Buck Meek. Moved from the 7th St. Entry. All original tickets will be honored.