The bluesy talents of South County jazz choirs were showcased over the weekend at the California Capital Vocal Jazz Show Choir Festival in Sacramento, where the Magnolia Intermediate School’s Starmakers won first place in their category as well as third overall, which involved competing against high school-level students. The Magnolia Blue, the jazz choir, participated in the festival for its first year and won second place, and Bear River Jazz Unlimited won the top jazz award in its category and Best of Festival. “It felt really good to win,” said Adriana Moses, a member of the Magnolia Starmakers. “It’s fun …