Audacity proudly flies its power-pop punk flag high. The Fullerton, Calif., four-piece band plays Thursday at House of Rock. Doors are at 9:30 p.m. A sudden rush of volume and swirl of buoyant melodies and youthful energy keep Audacity’s music bouncing along. Formed when members of the group were 14, Audacity is following in the footsteps of its inspiration, Anaheim’s Thee Makeout Party, while keeping up with power pop peers Nobunny and Gentleman Jesse and His Men and making its own name. The group released its second album “Mellow Cruisers,” a 29-minute blast of pure fun, in July 2013. Openers are The Golden Meanies and Modern Explorations.