I found Justin's discussion on this and a picture.
He wrote "The mini golf was more for the kids. They loved it like crazy. I gave away a round of 9 holes of golf at the local golf course here that I support a lot. Soon to be the world largest golf course. I basically just made a drawing at the end. I also did the promotion of lawn seed samples into a sandwich bag and stapled my business card on it. That was very popular.
I would do it again. Next time I would get a bit more ready than I did. I was kind of last minute and not ready so yeah. Next time maybe have more equipment or something. Get pictures of my work or something and blow them up and put them on the table."
Here is the discussion. http://lawnchat.com/?p=184