I practice parts of my game and map my clubs by playing specific holes. For example for club mapping I like Bethpage Black Hole #1. I can hit 170 off the tee and have a fairly level hole to play with little or no wind. You can use the mulligan feature to replay shots, but as others have pointed out, this will chew up you balls at twice the rate as normal.
As you are playing, make a note of the greens that have the type of putts (or other parts of your game) you are looking to practice and make a note of them. Then when you are ready to practice, play these specific holes by accessing them though the WGT Community Menu / Golf Courses. From here you can select the course you want and from there the specific hole you want
Note: not all courses are available through this option, so take a look at the course list first.
