New York-based "gypsy punks" Gogol Bordello don't exactly fit the conventional image of a great rock-and-roll band. The band is built on a traditional guitar-bass-drum foundation, but the sonic signature is in the crosscurrent of violin and accordion and in the Marco Polo pogo-ing of various extra percussion and extra voices. It's a communal clatter but with a frontman. And, oh, what a frontman. In concert, lanky Ukrainian Eugene Hutz runs the show with an acoustic guitar — which he sometimes plays — strapped to his back, testifying into the microphone via (intentionally?) broken English lyrics that manage to be both conversational and packed with picket-sign- or bumper-sticker-worthy slogans. He's flanked, typically, by an international assemblage of tough, colorful customers — retirement-aged Russian, Ethiopian bassist, Israeli guitarist, a back-up singer/dancer/mascot/percussionist who darts and weaves around the band like an extra from a punk-rock version of Cirque du Soleil. "It's transcontinental rock-and-roll," Hutz once explained. Later this summer, the band returns with a new album, Pura Vida Conspiracy. Before then, they return to Minglewood Hall and this time in the company of a particularly notable opening act: Bombino, aka young Nigerian guitarist Omara Moctar, whose invigorating third album, this year's Nomad, is his highest-profile yet, released by high-wattage indie Nonesuch and produced by man-of-the-moment Dan Auerbach. Gogol Bordello and Bombino play Minglewood Hall on Wednesday, June 5th. Showtime is 8 p.m. Tickets are $25.