I went to a few back in the day that started at a LFS, then stopped at peoples houses that had corals, etc… both in Toledo and Ann ArborWe used to go to some of the early frag swaps that our local reef club organized. Usually in a hobbyist's house. Sometimes they started at an LFS and then did a tank tour. I brought photos I printed from a Sony digital camera of my corals and traded or sold them out of a styrofoam box.