The conflict detection code should handle a special case:
If the Deck and Savanna are both reserved during the same time, it should warn the submitter:
"Warning. The Deck and Savanna are right next to each other in the Dojo, with no wall separating the rooms. Because there is already an event in the other space for the time you requested, noise from either event may disturb the other. Only proceed if you have discussed the matter with the maintainer of the other event, "Foo meetup", firstname.lastname@example.org."