@Amine157 How do you know which studio is rented and which keys to give out unless you differentiate them? Add a large picture or framed poster of a local historical attraction or beautiful scenery and use that as a description for the room. You could also paint a single wall with a distinctive color and use that to name each studio. You would then be able to tell the studios apart, and possibly attract guests who will want "the El Fuerte studio" even if it is exactly the same as the "La Fontanilla studio" or "Bounty Beach studio".
If they are 6 distinctive studios, I would list them separately. Then you would have good calendar control. I believe you can also create linked listings that would allow for renting 2 studios to 4 people or 3 to 6 people (if they are in the same building). It will take more effort on your part to do the linked listings.