Blues in Black and White

Andy Friedman and Jeffrey Foucault at Joe's Pub, Friday night.

Friedman is a singing cartoonist, an accomplished illustrator whose work appears regularly in The New Yorker and the New York Times and whose songs are as smart and economical as his drawing style. Foucault's songs are equally spare and show the strong influence of John Prine (of whose songs Foucault has just released an album of covers). They're old friends, touring together, swapping tunes and quietly singing harmonies as the other performs.