Hi Lisa
You can use Shopping Cart feature in Events Booking for this requirement. However, there is a limitation in this case :
1. Shopping cart could not be used together with the group registration option.
2. When customers register for 2 events for example, they could not enter information of each members for this registration (Member A for event 1, member B for event 2 for example...)
Hope the answers are clear to you
Regards,
Tuan