Full-auto firearms do make a satisfying lot of sound and smoke but if I'm turning money into noise and holes in a piece of paper, I'd rather use something that lets me shoot one round at a time. Even shooting someone else's ammunition.
...I'm not a bad shot and the emotional reward of punching paper pretty close to the X and knowing which shot did it is more fun for me than having the gun go brrrrrap! and keeping the whole burst on the paper.
If I was designing a pure-fun shooting range, it'd look like a cross between an old-time carnival gallery and miniature golf. I wonder if you could use a lightshow-type laser system for the target-occluding windmill blades?
4 months ago