Demo days are done at private and public courses. Call and talk to the head pro and ask if you could come out just to talk to the vendors to find out where they will have a demo day where you can participate.
Is it listed on the callaway demo day schedule?
I saw one on the schedule at a private course and I just walked straight from parking lot to the demo tent like I knew what I was doing and noone said a word.
I guess I understand why a private course would want to host something for their members. But that shouldn't be a demo day. They should set up their own demo day and not use another companies resources to benefit themselves.