Sharing our experience with this scenario (like you need more - lol) We experienced this situation twice – where we had booked Haven accommodations but our companions had not. We opted for the "Haven" rooms located outside the Haven area. During our time aboard the Escape, we booked a Haven aft cabin, and on the Gem, we booked the Haven Owner's suite. On both occasions, our cabin became a central hub for our group, with our non-Haven companions easily able to join us by simply knocking on our door. Our cabins served as home base, with the balconies proving to be popular gathering spots. Looking back, although we didn't fully utilize many of the exclusive Haven amenities onboard, we found great value in the spacious accommodations and the opportunity to host our friends and family, plus we could escape to the Haven when we needed a break.
We wouldn't hesitate to book the Haven outside of the Haven area again. Perhaps this option could work for you as well.