You can specify which catering order type should be used for each room individually.
Prerequisites
Path to the starting point: Infrastructure Building Management - Room Reservation - Meeting Rooms
Open the record for the meeting room whose catering order type you want to specify.
Ensure that "Catering possible?" is enabled.
In the Catering section, select the desired individual catering order type from the Caterer (Services) dropdown menu.
Click Save in the toolbar.