It is possible to limit the number of concurrent activities in the same time slot.
For example - if you want to offer 3 activity options from 10AM - 12PM, but only have enough resources to cover 2 of the activities, you can set the maximum number of activities that can be fulfilled to be 2. In this case, when the first two activities receive at least one booking, the remaining activity will be hidden and not available for customers to book.
To set this limit, click on the Gear icon in the upper right-hand side and then Advanced Settings.
On the LEFT side of the page, you will see a dropdown option for number of activities that can be fulfilled at one time:
Select your option and click the orange SAVE button before leaving the page.