By requesting the availability (Yes, Maybe, No) per person, you will find the most appropriate time to meet.
Events with a 'Group event' type often include 'Meetings', 'Dinners', 'Trips' and 'Weekend Out'.
Information type 'Roster'
By requesting availability (Yes, Maybe, No) per person, you can schedule them for the dates they are needed and available.
Events with a 'Roster' type often include 'Staff schedules', 'Volunteer schedules', 'Care schedules', 'Visiting schedules', 'Competitions'.
Information type 'Attendance (RSVP)'
Because you're going to request the attendance (Yes, Maybe, No) per person, you know exactly who's attending or not.
For this type of event, you don't set a final date. The dates you specify are therefore not proposals but definitive dates.
Events with a 'Attendance (RSVP)' type often include 'Birthdays', 'Parties', 'BBQ's', 'Game nights' and 'Trainings'.
Information type 'Registration'
The invitees can make a reservation (only 'Yes') for the (still) available days and/or times you have specified. This will give you a clear (restricted) guest list.
For this type of event, you don't set a final date. The dates you specify are therefore not proposals but definitive dates.
Events with a 'Registration' type often include 'Conversations', 'Visiting arrangements', 'Courses' and 'Workshops'.