YJ, from the oakmont window click experienace oakmont, then play single player, then you can select playing 9, 18 and 3 holes, ranked or practice. I have qualified and can click both options, you just need to go through the oakmont lobby, not the main single player lobby.
Griffygrif, one more for the road. I would avoid asking "think we got time to play the back 9?" most women dont like that.