I agree totally. They are fun, you can find unusual plants, or plants that are not yet in commercial nurseries. The Chicago Botanic Garden had such an enormous crowd that they also began a preview evening - along with food and beverages. However to be invited to the preview one had to increase the membership level. To me it was certainly a worthwhile perk. And if one had a higher membership level there were many other fascinating and interesting events. Sadly we moved several hundred miles away and I really miss the Garden as I was there every week.