The Third Friday dance begins with a lesson on Stabberinglender at 7:30 p.m. This is a catchy Norwegian dance with steps that are very basic, but that are combined in an interesting pattern. It is danced to reinlender tunes. Larry Reinert and Pat Pi teach. At 8:30 p.m., the Folk Voice Duo, Birgit and Phil Ages, will open the evening with their charming brand of gammaldans and fun mixers. Completing the September variety show will be the fiddle duo North & South (Martha Levenson and Leslie Foley), who will bring you a mix of gammaldans and polskas. Class, 7:30 p.m.; dance, 8:30–11 p.m. $15 (Skandia members, $10); kids, free. Info: publicity@skandia-folkdance.org, www.skandia-folkdance.org, or (425) 954-5262.