Actually, Cheesy Drive is a control scheme used by teams such as 254, 971, etc. The West Coast Drive is a separate drive system.

In Cheesy Drive, one analog stick is used to control forward/backward motion, and the other one is used to control left and right movement (think driving a car by changing the power on each side). This allows for small adjustments while driving that teams use to line up with the field and maneuver around obstacles. Alongside those "slow turns", which only allow the robot to turn a little bit, there are buttons that when held down on the controller do "instant turns" by making the two different sides of the tank drive go in opposite directions.

Aside from a game controller, you can use a steering wheel to do the small turns instead of an analog controller, with other buttons for forward/reverse, and instant turns.