I know four other households who own DVC. However, in our case it's more of an avalanche thing. Couple #1 bought several years ago. A friend of theirs bought while on vacation at WDW with them (#2). Then a bunch of us went on a trip together. Family #3 took a tour while we were down there and ended up buying on the spot. Couple #4 took the tour on the last day of our trip. I did, too, but I waited a few months to buy. On my last trip, I nearly gained a #5, but my cousin is still thinking about it. I swear DVC is contagious.
I did run into a DVC owner's daughter the weekend before my last trip. I was getting a pre-trip pedicure and the woman sitting next to me just happened to be going to the same resort at the same time.