Room feature is used in the calendar section from where you can book an appointments and assign different rooms for particular services.
Go to "Setup".
Click on "Calendar Settings" >>under appointment settings >> enable the room feature.
Click on SAVE.
4. Now, Click on "Rooms".
5. Click on (+) Icon to add the different Room name.
6. Add Room Name, Click on Save.
Now, on Calendar>>Room Calendar, You can now see the room that you have enabled and given a name. Additionally, you may select a room for a specific service when scheduling an appointment as shown below:
Note: If a room is booked for a particular time slot, then the same room cannot be booked for the same time slot for a different customer.
Additionally, for your reference, below is the video tutorial.