Mark & Greta Concert in Portland, Ore., with Tim Farrell

Mark and Greta bring their high-spirited show to the venerable non-profit Cafe Artichoke (the performance hall at the Artichoke Music store) at 3130 SE Hawthorne Blvd. in Portland. Performing with them will be Philadelphia fingerstyle ace Tim Farrell. (You hear Tim on NPR and Echoes.org all the time.) Tickets at the door.