Use custom questions to collect additional information from your invitees during the scheduling process. These custom questions can also be used to obtain consent from your invitees, such as having them opt-in to your mailing list or agreeing to your policies.
Add a link to your privacy policy, use checkbox answers and utilize the Required setting to create your custom question. If your privacy policy link is too long, you can always use a URL-shortening service.
View a copy of their consent on your dashboard in a scheduled event's details, along with any other information you've requested.