THERE IS NOTHING LIKE THE TASTE OF LARK. The Sesquicentennial series of DeKalb Municipal Band concerts ended this evening. Band director Dee Palmer has this schtick where he introduces Rossini's William Tell Overture with a request that listeners not think about the Lone Ranger, then, when the cavalry charge begins, he puts on a black hat. (What's that line, attributed to the elder Adlai Stevenson, about being able to hear that piece without thinking about the Lone Ranger?) Also on the evening's concert, a medley including Happy Days Are Here Again. There's a specific visual image I associate with that tune. What is it?