]t’s been a busy few days in New York City for Bob Mould: On Wednesday night, he played Bowery Ballroom, inviting “Portlandia” star Fred Armisen on stage to play guitar on three rarely played ‘Flip Your Wig’-era Hüsker Dü songs. And then on Thursday night, he appeared on “Late Night With Jimmy Fallon.”

Dinosaur Jr guitar savant J Mascis is no stranger to deliciously awkward interviews, so putting him head-to-head with “Portlandia” star Fred Armisen’s near-lookalike character Candace — co-proprietor of the Women and Women First feminist bookstore — was an inspired bit of promotion by Jagjaguwar Records.