This cheat is simple, and can be done fast.
- Login on your penguin.
- Attempt to go to a full server.
- When you get the “Sorry this server is full. Please select another server?” message click enter.
- It should now say, “You must provide your penguin name to enter club penguin”.
- Hit tab until the yellow marker is above the okay button and press space bar, you will go into the full server!