Sun. Jan. 3 -- Consult Cosmologic for your whole family’s avant musical needs. Formed in San Diego some 10 years ago, the quartet had beautiful chemistry right from the beginning: tenor saxist Jason Robinson and trombonist Michael Dessen conversing easily, bassist Scott Walton and drummer Nathan Hubbard swinging a well-defined tumbledown groove. Listening to their 2008 album, “Eyes in the Back of My Head,” I’m impressed for the nth time with Cosmologic’s Southern California hospitality, the way they invite you to pull up a chair and have a margarita while they toss some ideas around. As the years have gone by, they no longer all live in the same town, but when they get together, the old spark strikes up and the warmth returns; take advantage of this infrequently offered opportunity. Great opening guitar-wind duo, too: newly allied veterans Jim McAuley & Andrew Pask find new acoustic sensitivities and apply a touch of electronic atmosphere to their improv. The artists will probably have CDs for sale, and if you’re moved to buy one or more, you really can’t miss. At Center for the Arts, 2225 Colorado Blvd., Eagle Rock 90041; 7pm; $10; (626) 795-4989.