Guest Limitation for Events

I know you can limit the number of guests allowed per week/month on the reservation level, but I would love to see you be able to limit the number of guests certain memberships can have on an event level. 

For example, we have a Wellness Membership and I want them to be able to have a limit of one guest per week. We have our Wellness area reservations set up as an event though, so I can only limit the number of guests to one in each individual event block.