This pin falls under the personal category, and this fitness activity can be done absolutely anywhere. This activity is a workout that is targeted towards golfers, and it has no cost to it since no equipment are required
Use a pallet to create an indoor green to practice your put!
I wouldn't do a putting green by why not an indoor outside feel? Plant real grass, UV lighting, flowers, maybe even a nice breeze. Crank the lights and sunbath anytime and have an indoor spring year round!