Join the organization "TSR Tennis und Squash Rohrdorferberg" here on dingolix.
After registering, you can volunteer for tasks that require more helpers.

The details of the tasks will be sent to you and you will immediately be informed when the state of your assignment changes or a task is cancelled. Moreover, you can check your assignements at any time.

If you already have an account, you can use your existing username and password. You can then switch between the organizations after having logged on.