We did the Viking Bordeaux in 2015. My wife was 54 at the time and one of the youngest passengers on board. (It was fun to show her off!!). We enjoyed the trip for the food, wine, and ports. The scenery to me was just so-so, the Rhine or Douro are much more spectacular in that regard. Anyways, you will meet many interesting people of all ages and will never feel out of place.