I went to KH's in Northern California and they do not sound at all like the descriptions of Southern California KH's.
I did notice a few differences between KH's in California and Massachusetts:
More interracial marriages in California.
The sisters in the Massachusetts KH were told to wear tights when going out in service during the winter so they wouldn't get as cold walking in the snow. The ladies in California often didn't wear panty hose unless they were older.
In the halls here in Massachusetts that I have gone to I have only seen 1-2 African Americans at each hall and they were usually very very old or a young single sister.