For the San Diego chapter
www.crfgsandiego.org, there's normally topics on propagation, white sapote/cherimoya, mango, citrus, pomegranate/avocado, and a couple that varies from year to year. Maybe soil, pests, pitaya, rainwater harvesting...
For North County San Diego nc.crfgsandiego.org, the topics are more varied these days. Permaculture, dates, gophers, blueberries, cactus fruits.
The San Diego chapters tend to stay away from apples and temperate stone fruits. But the last-minute annoucements of special meetings are the really amazing ones. Some speakers have only short windows of stay in San Diego and they had to reserve a room on short notice and inform members with the news.