You can setup multiple exports such that rooms data (namely tasks) are exported and continued to be pushed to external calendar sources.
To setup s new export click the '+Add new export' button on the right hand side of the calendar view as shown in the illustration
A new dialog will pop up in which you can name the new export and select the target calendar into which the data will be exported. You can create a new calendar to keep the data organized and separate from your other data in the external calendar. You can change the filter options to select what type of events or tasks will be pushed to the external calendar. Once you have made the necessary changes, click the Save button to complete the setup of a new export.
Once saved you will see your new export entry display on the right hand side of the Calendar under Data Export. You can click the 'setup' or 'remove' link to manage the export setup.
