From the Super Mario Wiki
The Golf Clinic is an area in the Game Boy Color game Mario Golf. It is essentially a driving range with two lakes, two greens (one with the flag pole), three sand traps, and multiple hills. There are four coaches, two of which will judge the player's shot. The player must hit a perfect shot or else the shot won't be judged because it is not the player's best. The player is also able to use power shots although they do not affect the judged shot. Putts are considered mis-hits and aren't judged. The sign outside the clinic reads: "Come have your swing examined!".