Doesn’t she own another house, not the horrid house that she lied about, but another, nice home on the water? I think her beach friends live there.
I think the beach friends maybe were her old Delaware friends. There are towns like Rehobeth a couple hours from DC that people go to on weekends in the summer. There are accounts that Blowsy was working in one of those towns after high school and was a well known party girl. Her BFF may have hung out with her then, and those friends may be who she refers to as beach friends. Or maybe she goes to the beach a lot in northern California, but it is pretty cold at those beaches most of the year, and you need a thick wetsuit. I tend to doubt she would hang out at the beach near Palo Alto very much.