Alas, I have never been to L.A. =( I know the L.A. that Raymond Chandler describes in his novels, but obviously it's not the same L.A. now - different fashions, different music, different technology etc.
Is there anything that hasn't changed in L.A. since that time? (Please bear in mind that his novels are set in the 40s and 50s, so AFAIK, the only thing that's still there is the big Hollywood sign).
OTOH, I'm sure there are two other things that are still there: overfed Hollywood producers and far-too-hopeful Hollywood starlets. As for the rest, e.g. gumshoes pounding the pavement, corrupt and violent cops, or more or less honest DAs -- I'm sure you'd know better than me!
Any ideas?