Everyone so far has stressed to me that if you want fine dining esp. for adults only trips, Napa Rose is the place to go (in GCH). My husband and I had a great time with tapas (appetizer plates) and beverages of the alcoholic kind over at UVA Bar which is at the center of DTD. The vibe is very relaxed, chic, and lively especially with all the stores and restaurant lights on at night. House of Blues has some events every so often with bands playing or having a club night.
If you are looking into more in-the-park activites, I second the Blue Bayou lunch or Dinner and Fantasmic Dessert Buffet (which will be about 53 bucks per head). If you wanted to splurge even more maybe you can take a limo around LA/Hollywood area..do a Stars Tour (not to be confused with the ride Star Tours hahah)...but this is about 35-40 mins away from anaheim (give or take traffic). But if strictly disney, there is so much to do. Spa treatments for the ladies while guys enjoy ESPN Zone for beer and sports! Trust me, my husband and I have so much fun every time we go!