Matthew Sweet’s songs skillfully blend hot and sour

There is a heartache in Matthew Sweet’s voice that pegs him as a romantic who knows both the euphoria of being in love and the pain of breaking up. On his first Chicago gig as a headliner, Sweet performed a tantalizing midnight show Saturday at the Cabaret Metro where he and his tight backup band channeled his wisely ambiguous lyrics with playful abandon, letting the audience know that though he may have been beaten up emotionally, he’s not a whiner.