1st step: Creat a smart list.
In order to create a smart list, follow the following link: https://app.intercom.com/a/apps/q6foivp2/articles/articles/4466282
2nd step: Select the filters for the smart list.
Booked more than one class,
Activate "With status present"
Activate "of activity" by clicking on it > Select the activity in the scrolling menu by clicking on the arrow,
Activate "Filter by date" > Choose the date or the dates' interval > Add.
⚠️ Click on the disk in order to save the filter.
3rd step: Scroll down the members' list.
On the added filter, click on the arrow in order to scroll down the members' list.
You now have the list with all the members required following your filters.