Too Old to Be Loud. Heritage Square is unlike any other dinner theater in the state — and possibly the nation. The facility itself debuted in the 1950s as Magic Mountain, a Disneyesque theme park with whimsical buildings based on Colorado architectural styles. In 1970, it was bought by the Woodmoor Corporation and reincarnated as Heritage Square; soon after, G. William Oakley opened the Heritage Square Opera House, which featured wickedly silly — yet oddly clever — melodramas. Current director T.J. Mullin took over in 1986 and shifted both the name and the focus, alternating hopped-up versions of classic stories with shows that are pretty much a medley of songs. Too Old to Be Loudis the sixth in a series based on an annual reunion in the Boylan High School gym, a thin plot line that serves as the excuse for this talented ensemble to offer some great rock and roll, hilarious sendups of pop stars and a rendition of the Beatles' "Yesterday," during which Mullin gets to reveal his surprisingly melodious tenor. Presented by Heritage Square Music Hall through October 14, 18301 West Colfax Avenue, Golden, 303-279-7800. www.hsmusichall.com. Reviewed July 12.