I suggest that you call to find out days and times they are open, since this tends to change from time to time. Los Angeles Temple LDS Family History Center 10741 Santa Monica Blvd. Has a large collection of vital records and census records on microfilm. Also many books and computer access to the IGI, Ancestor File, etc. There is ample free parking.
Copying is available from microfilm, books, and computer for a fee.
Some supplies can be purchased here. There are no restaurants in walking distance so, if you don't want to drive to lunch or dinner, you better bring some food. Huntington Beach Central Library 7111 Talbert Ave. A very good collection of books and periodicals is maintained here by the Orange County Genealogical Society. There is ample free parking, copying machines, snack machines, and microfilm readers.