An epic trip!1 I've also played in most of those rooms (though over multiple trips). The Quad chip is sure to be the most rare of the chips since it's lifespan was so short (before being re-renamed to the Linq). Congrats on such a fine collection!
That's not surprising. It's a "locals" casino. Because it's away from the strip (and downtown), it gets more players that live in Las Vegas. Players know the dealers and each other, so conversations take place like a weekly home game. Some of my favorite card games in a casino have been in "locals" casinos.