I talked with her about it, and showed her a video posted by RCI, as well as the sample menu on the Cruise Planner. She wasn't sure about the menu, thought it might be a little TOO adventuresome. She also feels it's as much about the wine as the food and that it wouldn't really work for her because of that.
I'm guessing that the average age of the people in the promotional video didn't help. She probably would be the youngest one there by a country mile, and she's already self-conscious about being "old for her age".
It was worth a try. I may still go on my own, or she may change her mind over the next 8 months. Will take it as it comes.