If you'd like to list multiple spaces, you can create a separate listing for each space that is available. Each space will have its own listing page and its own calendar which should accurately list the details of the space and availabilities.
To create a new listing, log in to blackdoors.com and go to Create Listing.
You might also choose to create a listing for your entire space and separate listings for the different spaces within it. However, be sure to sync your calendars between the listings as to prevent clash of bookings.