From the multiethnic and cosmopolitan city of Vancouver, British Columbia, comes the heroic Mad Pudding. This fascinating band fuses Anglo-Celtic and funk sounds to create a music that reflects the distinctions of its hometown. The title cut of the group’s latest CD, Grand Hotel, is a glorious a cappella song that vividly describes a Vancouver establishment in which exhausted loggers of the early 1900s found much-needed rest during weekend breaks. “Reel di Janeiro” is a medley that finishes off with a lively tune learned from Celso Machado, a Brazilian musician who now lives in Vancouver. Composed by French native bassist Boris Favre, “Léon Accordéon” is a jazzy romp with exuberant fiddling and great vocal harmonies. And dynamic fiddle and accordion interplay—along with Amy Stephen’s sultry vocals—give a hot klezmer flavor to Leonard Cohen’s “First We Take Manhattan.” Opening for Mad Pudding tonight is hammer-dulcimer wiz Peter Turk. The multi-culti hoedown begins at 8:30 p.m. at IOTA, 2832 Wilson Blvd., Arlington. $6. (703) 522-8340. (Ken Roseman)