User Story
As an event organizer, I would like to request available services that correspond to available linked rooms, even if the services are available only in a single room that has been linked, once linked those services should be available to the linked event and available quantities should be accounted for so that I can take advantage of the services available in the space my event will be using.

For Example
There are 2 Room resources that are linked. The one room M1 offers sandwiches, the other room M2 offers coffee
When an event organizer is selecting the event space, they should be able to add the services available in M1 and M2 since when the spaces are linked both services are available for a single event.