Some questions to help give better response, are you house shopping, being a tourist, traveling with kids, age bracket, looking for night life and will you have a car rental?
What kind of entertainment your looking for?
The weather in September will be like it is right now in LA. Short sleeve during the day and possible light jacket during the evening.
This is a good thread with local lunch-dinner options around or near the city.
https://www.city-data.com/forum/charl...nch-spots.html