I'm pretty into the idea. I've a few concerns, and wonder how you'll handle them. 

The first is that this sort of premise will lend itself to a lot of conversation, which tends to make for either very short, or else unnecessarily inflated posts. Do you have a post length guideline, or would you prefer conversations happen in collabs? 

The collab idea brings up another concern, which is just that tight quarters might mean that two characters are interacting in some way in one room, but if their post slows down, or is delayed, how will another player or group of players handle that room? Basically, if we're both trying to write the same ten minute span, but I don't know what the other group does yet, it kind sticks me in place, even though I wasn't even involved in their scene. Does that make sense?