Yea its not rare to catch tarpon and snook in golf course ponds. Here in NSB if you go far enough up into spruce creek it will be mostly freshwater and you can catch bass, snook, redfish, and tarpon in the same day. Ive never been succesful enough to do it in one day but ive seen tarpon in the same places ive caught bass redfish and snook.
From my experience golf couses that are close to saltwater rivers usually have drainage into the river and the snook and tarpon go up through the pipes and haver a nice place to live and not many people bother them.
Ive never been succesful enough to catch one of the pond tarpons either.