I'd certainly love for my Sims to have a fun day or night out at a mini-golf course! We definitely need some new date night spots for our Sims and I could see this being perfect for it, and family outings, too!
I do think we need more sports-related things, too, so if it was part of a larger sports pack I'd not complain. Things I would love to see include the return of the Chin up bar and jump rope, as well as kettlebell/free weights, playing catch with a baseball and glove, kids practicing batting at a T-ball stand, volleyball, lacrosse sticks ... maybe some international sports, as well, like rugby and cricket and expanded gameplay with the soccer ball.