The Infamous Stringdusters play harmonious rock and bluegrass big-band style, acoustically. With Fitzmaurice band. Details: 8 p.m.; Rams Head OnStage, 33 West Street, Annapolis; $18.50. Ramsheadonstage.com

GATHERING

Get political! Red Emma’s hosts “Introduction to the Copyfight,” a session on e-voting activism and other ways to creatively promote your philosophical beliefs digitally. Details: 7 p.m.; Red Emma’s Bookstore and Coffeehouse, 800 St. Paul St., Baltimore; free. 410-230-0450; Redemmas.org