Alex Brown Church chose his stage name well. Sea Wolf, Churchs alias when he sings and plays guitar, sparks expectations of mystery and danger before the music ever begins. Its a wanderers name, stolen from a Jack London novel and well-suited to Churchs rustic indie rock about heartbreak, murder and loneliness. Like the equally good rock moniker Pedro the Lion, the Sea Wolf brand includes the California songwriter and a revolving lineup of musical contributors. Tonight, see who howls with Sea Wolf at the Gaslight Tavern and Coffeehouse (317 North Second Street in Lawrence, 785-856-4330). Sea Wolf