Here's an example... A women with a baby in a baby carriage are walking thru a cross walk. A wheel on the carriage breaks:

In NYC: people just help carry the baby carriage across.

In DC: people ask if you need help, then help carry the carriage across... if they have time.

In LA: people start up a nice conversation if you need help, provide suggestions, then continue on their way (while you move the carriage).

Currently live in LA, still have prop in Glover Park. Miss walking to everything, people like community IN DC; but LA, 100x more diverse, friendly strangers, more stuff to do. Both take 45min to get to say Dupont circle or Santa Monica.