Reed Sparks is firing up a new restaurant and music venue on South Broadway. The 33-year-old Denver resident is in the midst of renovating a 24,000-square-foot building, built in the 1940s, at 476 S. Broadway in Wash Park West. It was previously home to LeGrue’s, a flower shop and year-round Christmas store that operated for 50 years. Sparks is calling his business BurnDown, a reference to a fire in 1978 that destroyed much of the building’s interior, leaving a hole in the center that has been incorporated into the design as a three-story atrium. “We figured we might as well embrace the past,” Sparks said.