The top and bottom photos show this course which was set up in about 20 minutes at a local community golf course putting green.  It was so much fun that we're hosting a mini golf party again this year!  A course like this can be set up on just about any surface - short grass or carpet, asphalt (use chalk, too!), even hardwood surfaces.  Slower rolling balls are available;  just ask for more info.
The middle image was set up by Nicole Weller, award winning PGA and LPGA golf pro who specializes in young golf instruction. Â It takes more time to apply the string with golf tees, but the look is nice!
The rope was purchased from Home Depot; the decorations from Michaels, Big Lots and miscellaneous dollar stores.  Total cost;  under $80.
Also below you'll see images of a non-structured Halloween putting party in a backyard as well as a birthday party.

Click here to see simple Harvest Festival ideas!