Gib,
Tom Mac has it on the spot here. The Mid-West "Money" used Pasadena as their winter-homes much like many in New York, New England, NJ and PA. utilize Florida. They did their golfing at Annandale, and when the golf boom really went into over-drive in the early teens, they built Pasadena and Midwick. By then it was not only a sport of influence, but suddenly Mid-Westerners started to live out here full time, as their business concerns expanded on a much bigger scale. Many of the clubs were built to cater to the businessman who wanted it to be close to the office and where he could get a quick 18 in and then get back to the office without anyone noticing he was gone. The Golden Age of Hollywood was also a big part of it--LACC, long a mainstay in all of this--expanded. (pre-Fowler) It opened up further doors for Golf, and soon there were not just a few, but many GREAT golf courses that existed all ove the Southland by the end of the 1920's. These were places that weren't just local, but hidaways and big elaborate resorts designed for Hollywood set. We are talking of a boom of about a less then a 15 year span of golf course building, and where Billy Bell more then likely got any rest, or at least not until once the Depression really took hold of SoCal in early 1933. (I will get the exact count of courses built during that time, later)
Yes, I'm a bit of a homer here, but I do think that anyone that thinks that SoCal has never had GREAT golf is really misinformed, because what I have seen of it, it may have been more on a par with the Arts & Crafts revolution then the East. A simple tour of a Frank Lloyd Wright or Greene & greene website will tell you all you need to know, or a simple click of the brilliant "in my opinion" piece by Tom MacWood.