"Sesame Street" may not be a real place, but tell that to some of the people Michael Davis met when researching and talking about his new book, "Street Gang." “I met a lot of people who I worked with in New York or got to know in New York — transplants — who said to me, ‘When I first arrived here in New York, I had this strange desire to find Sesame Street,’ ” he said. Well, to paraphrase the famous theme song, who wouldn’t want to get to “Sesame Street” For two generations, the fictional block of brownstones inhabited by curious children, friendly adults and some odd-looking Muppets has helped shape childhood education by offering exercises, games and life lessons all wrapped up in a television-friendly format