LA houses the Lakers, dodgers, and so many more big brand teams.
A consumer which is defined as any person in a free and open market to openly trade their wealth and income in return for an item or service.
Residence defined as the area that surrounded the immediate perimeter of the said consumer.
Hence, by the principle of socializationpeople are more inclined to buy sports gear to represent their teams and inclined to participate in consumer purchases based on their peers.
It becomes the "lifestyle" and "ideal" personalities in a place such as LA and this inherently drives up sales of sports and entertainment commodities.
The location, or residence directly exposes the consumer to the products in a market where it "hot" and in style/demand.