Check out these pages for information on events such as public seminars and talks on various issues:
University of Cape Town (UCT)
UWC will be hosting the Desmond Tutu Annual peace talk and a short documentary film festival in a few days. Check the events website in the link above.
UCT are always hosting an array of interesting talks and seminars. You may have to RSVP to ensure a spot. Usually refreshments are served after the UCT talks.