From 7:30 to 8:30 p.m., Pat McMonagle and Marjorie Nugent will present the Norwegian dance Russeren, a fun and accessible reinlender variation. You can see it here: https://www.youtube.com/watch?v=GzNKL2kcGmw. Open dancing begins at 8:30, and we have some new groups tonight, as well as a long-time group! The new groups are the fiddle trio of Deb Collins and two of her students, and the duo of Eric Butterworth (accordion) and Ramona Wijayratne (vocals). They will be joined by the Skandia Kapell for a great evening of music and dancing. Class, 7:30 p.m.; dance, 8:30–11 p.m. $15 (Skandia members, $10); kids, free. Info: www.skandia-folkdance.org or (425) 954-5262.