Group booking should have the option to only show appointments that are available at the same time.
Most clients do not realize when they are given a staggered time. Even when they do realize, they're unhappy that they were shown a specific time that isn't available for both appointments.
"Group Booking" is understood by 99.9% off people as a group of people coming together, not a group of people waiting in the lobby for 3 hours while the other people in the group receive a service.
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