Songwriter and guitarist Paul Margolis and accordionist John Shock have been playing music together for almost 30 years. Starting with Shock’s band Two Legs, then The Polkats, and now with The Stone Hill All-Stars, they have been at the helm of some of the best roots-rock bands in Baltimore. Their blend of cajun-flavored polka lies somewhere between Ry Cooder, Los Lobos, and The Pogues—plus polka.