I first started yachting in high school, participating in the Redondo Union HIgh School Yacht Club. It was here where i was introduced to The RB Yacht Club.
As a member, one involves the benefits of a newsletter which features local yachting events as well as social gatherings. I wouldn't reccomend joining if you don't really know anybody in the club already, only because most of these old men are rather snobby and have predefined niches.
Now that i'm out of high school, i'm no longer a member.
I would recommend that you call them up and ask when the next "Novice and Amature Yachting Social" is, because it is here where you can make a solid decision on whether or not to join.
For the professionals: Go for it. Get with a few buddies and join together, it would make the experience alot more enjoyable.
Either way, good luck! Once you're in, its a whole lot of fun.