My college ultimate team had an 18-hole "campus course", basically an organized version of what you said; the pins are tables, grills, lamp posts, trees, sculptures, signs, hydrants, drainage pipes, etc. And of course, hole 18 was to to tag the scoreboard at the other end of the football field -- with the mandatory such that you must go through at least one of the field goals posts!
We also had to play late at night (tee time 12am) to minimize the amount of pedestrian traffic getting in our way. Or, send the rookies out to play defense on the bystanders!
As I understand it, a lot of college ultimate teams have some defined course like this through their campuses.