Not necessarily--my cabin connected with another cabin, but there was a solid wall between our verandahs.
However, on our other side we had the option to open a verandah with the room we did not connect with. I think there was a stretch of four rooms where we all could have opened up the verandahs. Several of them did (we were all the same traveling party), but in my room we opted not to do so and kept our verandah private.
Man, I hope that makes sense.