Chinatown today is very different from yesteryears. For those who lived in Chinatown in the 1950s to the 1970s, most, if not all of them are no longer living in Chinatown. At least not in the old pre-war houses.
Chinatown can roughly be considered to have three main parts, the Cantonese part, near to the People's Park Complex (between New Bridge Rd and South Bridge Rd, right to the former Upper Chin Chew St) , the Hokkien part (the area around Telok Ayer St and Amoy St stretching to Boat Quay, the Teochew part (Merchant Road and Clarke Quay).
Many looked back with nostalgia. Here is an interesting Blog that shares with us on this yesteryears in the Cantonese part of Chinatown.
My Memories of Chinatown
[Ack:Lam Chun See http://goodmorningyesterday.blogspot.com]