Sufficient unto themselves

"When a new shop opens in a small New England town, there is rarely a crowd before the doors open, and never a line... Certain things are simply Not Done, particularly not in the tight Yankee enclaves north of Boston. These are societies which exist for nine months of every year mostly sufficient unto themselves, and it is considered bad form to show too much interest too soon, or in any way to indicate that one has felt more than a passing interest, so to speak." 

~Stephen King from Needful Things