i don't know, but.... How about Phlan of FR? The city was once VERY famous in the gaming circles (with the computer rpg and the modules later), but also never much detailed.
Also, it had a wild frontier taste AND ancient (and less ancient) ruins full of bad things (and much of low levels), with nice adventures possibility around. And if the times REALLy go bad is it is implied, well... point of Lights is a given feel, already much.
Maybe too much FR fluff to be used as if, but that could have been a nice choice.
Otherwise, I say new - something neutral and classic, or Hommlet or the Keep town or Saltmarsh for old schoolness.