My vets do vet/client evenings where the vets do talks and they get guest speakers in. Sometimes saddlers/physios sometimes equine researchers & scientists. I went to one with Prof Knottenbelt was really good and very informative I think they are a great idea.
Riding clubs often also put on evening talks etc, especially in the winter. I also like the days that British Dressage put on, I've been to some brilliant seminars - you don't have to be a member to attend AFAIK.