First: George Cole, the guitarist who’s performed with jazz legend Keely Smith and was guitar instructor to Green Day’s Billie Joe Armstrong. Second: Mathias Minquet, the multi-instrumentalist who’s performed with Enrique Iglesias, Laura Pausini and the Pussycat Dolls. Add Echae Kang, Korean star violinist at Berklee College of Music, and Kaeli Earle, a rising star from Washington playing piano, cello and acoustic bass, and what’s the sum of this fateful grouping? The math isn’t hard to do: George Cole and Eurocana bring out a celebration of American classics with Gypsy-fueled jazz on Saturday, July 28, at Studio 55 Marin. 1455 East Francisco Blvd., San Rafael. 8pm. $13—$15. 415.453.3161.