Sure, it's a nice place to go think if you're not thinking about girls and/or don't even want to, but where does it fit into PUA? Is it a decent place to sarge, or more a place to bring a chick? Pro, hot chicks in bikinis, cons being potential bitch shields(?)/there with boyfriends or family, high concentration of girls with a decisive preference for the musclehead type due to a high concentration of the musclehead type, your own aesthetics matter more(no stylish button down over T shirt to optimize a slim/skinny fat physique if that's what you're working with), people in "let's have fun" mode possibly negating introvert tactics and strategies. Any thoughts?

You could hit the gym and build a sexy physique for yourself. I wrote an article about this on my blog. It's called "how to build a manly physique." Search for it if you're interested. Quit making excuses.

Yes. Beaches are great places to meet girls. Anywhere there are girls is a great place to meet girls.

Rather than theorizing it, hit the beach, speak to some women and see what happens. What's the worst that could happen, your ass gets rejected, oh fucking well, you move on with your head up knowing that you did what 99% of men never have the balls to do.