I like Black's Beach in San Diego. There's just a comfortable relaxed feeling there. People come in any state of dress or undress that they're comfortable with, and for me it seemed that there was a complete lack of a judgmental atmosphere.

There's one in New Jersey, Gunnison Beach on Sandy Hook. Since it's on federal land managed by the National Park Service, it's free. But the parking lot fills up early. Went there once with a few friends; we all kind of stayed with ourselves and didn't take our clothes off. But yeah, it's definitely a "clothing optional" beach.

Determining if there are enough of them would depend upon who you talk to/ask. As for me, never been to any.

I've been to the one on the south western edge of Martha's Vineyard, MA.

No. There are not enough.

I've been to nude beaches at
Blacks Beach in Sand Diego CA
Son Onofre Beach in Orange Country CA (no longer a nude beach)
Rooster Rock State Park (east of Portland, Oregon)
Collins Beach on Sauvie island (NW of Portland Oregon)

Every beach is a nude beach if you're adventurous enough.

There are some. Im not that bold to getting sunburnt in the wrong place...lol.

"Enough" is a wholly subjective word. It is entirely open to interpretation, depending upon
whether someone is into being a nudist, or not.

I never saw a beech wearing clothes

I have never been to a nude beach but have gone to a natural hot springs where it was clothing optional. It was really relaxing!

No, there are not enough, and yes, I have been to some

Pirates cove in Avila, CA Is a good one.
Only one I know of cause it’s close to home.