Few concert experiences are as moving as those for live classical music. An orchestra can fill even the largest venue with clear trebles and thundering bass. The Sacramento Philharmonic is no exception. Thanks in part to sponsorships by the National Endowment for the Arts, Target and the Recovery and Reinvestment Act, the Sacramento Philharmonic is putting on a first-time venture of five nights in a row of free neighborhood concerts. The first show in the series was Thursday night at the Benvenuti Performing Arts Center in Natomas. Though the venue could hold many more, about 75 children, parents and couples laughed at two playful introductory pieces before intermission, followed by the