The world grows more cruel by the day, and the people become more crass by the hour. As the temperature increases, so too does our anger and disgust with our fellow citizens. If there is a boiling point for the human soul, we near it sometime in the dog days of August. And so when a crowd gathers on the corner in the late twilight, the worst is expected. But theres no angry buzzing coming from the knot of people; its an anticipatory hum, and it breaks into shouts and laughter when a limousine pulls up to the curb, and a dead-ringer for young Priscilla Presley steps out. In quick order follows Lisa Marie, Gladys and Vernon Presley, a sweating Col. Tom Parker and an even more sweaty person in a horse costume. The crowd is delirious when Elvis himself, resplendent in white, emerges and acknowledges the throng with a regal wave. Then the King herds his family into the corner display window of Blueberry Hill (6504 Delmar Boulevard, University City; 314-727-4444 or www.blueberryhill.com) and delivers a tight twenty-minute set, outshining the sun when he sings But I cant help falling in love with you, to a giddy woman with her hands on the glass. It doesnt matter that Elvis has been gone for 30 years, and that this is Steve Davis inhabiting the role for a brief moment, or that all the members of the Elvis family are child mummers, or that its so hot condensation streams down the window. Were all laughing and happy, and the world is a better place because of rock & roll and make believe. Every year Joe Edwards produces From Tupelo to Graceland, and every year it makes summer a little more bearable. Tonight at 8 and 9 p.m., Steve Davis does Elvis justice in the front windows for free, and then at 9:30 p.m., Davis and the TCB Band do a full-on show in the Duck Room for $15 a head.