One night in Vancouver, and out of the hundreds of excellent restaurants, people would tell a tourist couple to head to the White Spot or the Old Spaghetti Factory? You might as well have included McDonald's!
I mean, I love the White Spot for their burgers, but half of that is nostalgic, and I wouldn't recommend it for a touristy couple's last night in Vancouver!
Where did you end up recommending?
I'd probably suggest somewhere like Cardero's, or Parkside, or Season's Hilltop Bistro, depending on how far/how much they wanted to travel, whether they were foodies, or whether they wanted a view.