As someone who has had holes-in-one on championship courses, executive courses, and mini-golf courses, I'll tell you mini-golf holes-in-one are harder. The artificial grass is slicker, and you must time your putt just right to get it through the whirling windmill blades. Also, the mini-golf holes are small. The holes at the Fenney putt-and-play are almost the size of Frisbees.
The bottom line, though, is holes-in-one are 10 percent skill and 90 percent luck regardless of the type of course.
Now, tell me this. If I get a hole-in-one at Fenney, do I have to buy drinks for everybody?