Can a booking be reused, e. g. from one week to the next?

Yes, by using "Copy booking". Since dates will not be adapted, you should use a trick: Create a booking as usual, and include the date in the title field:

Enter the appointment options as text:

Select further options and save:

To create a booking for another week, display your bookings and select the original booking:

There you can create a copy of the booking:

This creates a new booking titled "Copy of Office hours Prof. Muster - Week 25. - 31.05.2020". The old booking remains unchanged. Update the title of the newly created booking:

No further changes are needed - just Save.