Le Potager is an antiques and home decor store located just around the corner of Harbor Blvd and Brookdale in Downtown Fullerton. It was formerly a private residence owned by a lady named Lillian Yager. Her ghost has been seen at various places throughout the house, always wearing black.
The place itself is charmingly furnished with home decor-related knick-knacks that give the store a very cozy feel, but also with all the decor lying around it does look like the type of place where a spirit would be able to kind of 'blend in'.
Have a look at the Le Potager website for a gander, Le Potager