There is a hidden room in Toad Town where you can play games to earn 
cash. To access the room, go South in Toad Town until the Li'l Oink 
Farm. To enter the room, go left when you enter this area. Strike 
the tree with your hammer and a pipe will become visable on the right. 
You can now enter the room. You must hold either a Silver and/or the 
Gold card to play.