1st Step: Create a Pass.
In Products > Pass > Click on "Create a new pass" at the right bottom of your screen.
2nd Step: Set up correctly your special pass.
Fill in the form:
Name
Price with tax (price that the customer will pay)
Tax
Unlimited credits > Attention: make sure to check this box !!
Determine the validity period of your pass > Only available for new customers and tick only the category "Workshop"
Your special pass for an open day workshop is now ready!
If you need more information on passes and compatibility. See this section!