I am basing this advice on one tour experience only, so it might not be accurate. But just in case you’re on the fence about the type of room to request on your RS tour, I’d advise against selecting twin beds…l
On 2 prior RS tours we traveled as a family and had triple rooms. Some were wonderful, often 2 room configurations, others just fine, and occasionally one wasn’t fantastic. Overall a good experience.
On our most recent tour we traveled as a couple, and acting on what is probably way outdated intel, I selected twin rooms because once upon a time in Europe double rooms came with a very small bed. The twin rooms on this tour were almost universally less nice than the doubles I saw (even some single travelers had a larger room with a queen or king bed), small, often dark, and more poorly situated than the rooms of our fellow travelers. The room at our arrival hotel was very nice, but because we arrived a day In advance and wanted to keep the same room, they changed us to a king room. Our guide changed us to a double (actually queen) room at one other hotel, and that room was also nice. But overall we had more bad rooms than good—and one (in one of the quirkier places where some rooms are actually full sized apartments and others are dark, tiny, and smell bad) was by far the worst RS room experience we’ve ever had. If I had to do it over again I would definitely NOT have requested twin rooms!
Again, just my personal experience.