Looking at their web site, they seem to be a small yacht club catering to power boaters. Since you have a power boat, this is a good thing. They have a clubhouse, which is a nice place to go, especially if you have your boat in the adjacent marina. Also, you can be with people who enjoy the same types of things you do: fishing, socializing, cruising, just enjoying being with boaters.
We belong to the Cabrillo Beach Yacht Club and enjoyed it very much. When we joined, we had a sail boat and their event mostly catered to sail boats, even though there are a lot of power boats. The cruises included both types and were fun. Met a lot of nice people. We moved away, but still retain our membership for reciprocals. This allows us to get free moorage as we visit other yacht club up and down the coast. Years ago, we also joined the San Fernando Valley Yacht Club, a small group of trailer sailboats. We still see some of those people, very enjoyable.
So here's a couple of questions. Are there any boats your size? When we downsized to Journey On, we lost some clout, so make sure that there's boats of your size included in the mix. Trust me, people with 50' boats don't look at C-Dories the way we do, cute or not. How much does it cost? In San Diego, we enjoy the Southwest Yacht Club and wouldn't mind joining, but the price is too steep for us. So we enjoy their hospitality using reciprocals including their visitors dock. The DBBC is cheap, $100 to get in and $100/yr. Do they give you a discount on slip fees?
All in all, I'd heartily recommend it. Visit them a couple of times, go on a cruise with them. Boating clubs are always looking for members, they'll be glad to have you along and you'll find out if you like what they're doing.
Boris