I think Beach Glass is more of a rarity on the Atlantic Coast. All of my years vacationing up and down the Eastern coast-line, I have only collected a few handfuls! The most I ever found was in Florida.
Supposedly you can find it further out East on Long Island where the shore is rockier and rougher. We never go out there though really. And we NEVER go to the North Shore of Long Island. Maybe it's time to plan a much needed weekend getaway?