Should the Event support multi-user meetings you are able to create meetings with multiple participants. There are two ways of creating such meetings:
Open the profile page of the person you have a meeting with and display meeting details.
On the list of participants you will find a "Add invitee" button
You can select up to 10 people on a single invite and only select people who are available for relevant timeslot.
Click 'Invite'. Once this has been done, you will also see additional participants on the list; and each of them needs to accept the invite separately.
If your event has the option to book additional meetings in the event, you will be able to schedule new multi-user meeting