Philadelphia quintet Man Man play novelty music that’s so old-fashioned it sounds futuristic. Opening for Fiery Furnaces last night at Neumo’s and clad all in white sports attire, these five multi-instrumentalists purveyed an athletic brand of avant-garde circus music that mocks logic and decorum (think Mr. Bungle but with way more facial hair and hyperkinetic stage maneuvers). Unpredictability is Man Man’s métier. They swerve between rambunctious, klezmerized prog-punk and maudlin, beerhall sing-alongs with a WTF? strategy that nonetheless spurs wildly appreciative crowd reactions. Vocals shift from absurdly romantic crooning to electroshock-therapy yowls to robust, barbershop-quartet hamming. On some songs, everyone plays percussion (including pots and xylophones). On others, everyone blows on miniature novelty-shop horns, and it sounds incredibly like Master Musicians of Jajouka at a drunken wedding reception. Definitely an acquired taste, Man Man’s music shows up most indie rock as a pantomime of rote, polite mannerisms eked out by timid conformists. Man Man are wild to be born.