They are like neighborhoods, or even villages. The folks who keep boats there have a patriotism for their marina.
Some marinas are fancy, well-manicured and with every amenity.
Others are more rustic, with the comfortable lived-in look. They, in a way, are a reflection of their customers, as well as their owners. We think of this in a complimentary way. They convey a message that the California Delta can accommodate a lot of different kinds of people, along with a variety of lifestyles. They may have cafes, restaurants, saloons, night clubs to help support a social life for the marina-resort regulars and visitors.