PUBLISHED: 3:55 PM on Wednesday, March 19, 2008 Photo: Ball in the House given standing ovation Mihael Blikshteyn photo Even before doors opened to the public, JAHC volunteers inside the ANB Hall could not resist tapping to the beat of the a cappella group "Ball in the House" during their warm up. The five-man pop and R&B band from Boston received a standing ovation for their concert with no instruments. The percussion part was "sung" by Jon J., a band member characterized as a "human drum machine."