Justin Bieber Teaches Fiancee Hailey Baldwin To Golf

Justin Bieber and Hailey Baldwin have been engaged for a little over a week, but they're already like an old, retired married couple ... spending their free time golfing.

Bieber played golf instructor at Top Golf Sunday in Alpharetta, GA, teaching his future wife how to swing a club. Witnesses tell us he paid extra attention to Hailey and made sure she got the hang of the game. He's been an avid golfer for a while.

Since rekindling things, the duo have been hard to keep track of ... they got engaged in the Bahamas, then returned to NYC, then spent this past weekend in Miami only to wind up in Atlanta.