Actually, if I may interject...
Titleist is in Fairhaven, yes, but the club division (R&D;/Manufacturing) is in San Diego. Carlsbad to be specific. Callaway is in Carlsbad as well. A number of other golf companies make home in San Diego - Ben Hogan, the Scotty Cameron Studio, Taylormade/Adidas Golf, Aldida (shafts), Mitsubishi Rayon (shafts), True Temper.
I'm sure there's more I've missed, but I can't recall at the moment.
Anyway, my point is that if you want to get into club R&D;/development/manufacture.. then San Diego is the place to be.