It seems like people are content to buy their musical instruments with their groceries and electronics these days. With mega-stores now selling cheapie beginner packages for the Valley's dilettante musicians, indiscriminate shoppers spend their hard-earned cash for inferior product without thinking about warranties or a guarantee of service. For the rest of us who think it's important that the people selling the instruments actually know what they're talking about (or at the very least know the difference between a tenor and an alto sax), there's Metro Music Center, the longest-standing single location instrument store in Glendale. Metro services a diverse clientele — everyone from the guitar-slinging emo kids to accordion-happy mariachis. A plus — Metro Music features a staff of talented instructors who offer private lessons on every instrument from oboe and violin to guitar and piano — let's see Costco try giving flute lessons!