My husband of 14 years and I DID dance to "Crystal" at our wedding!! It's been good luck for us so far! Funny thing was I really wanted to dance to the BN version, but the DJ (even in 1999) wasn't equipped with a turntable or tape deck. LOL Ah well, good thing I love the white album's version, too! As far as things we fans say, this may not be quite what you're referring to, but even now, 16 years (!!) after The Dance, my husband and I will still find ourselves quoting Lindsey in one of his speeches from the album, "Isn't that weird??"
