The more I go to Disney, the more we've adopted this style of dining. I love it! No ADRs to fool with, and with one exception we've never had to wait.
Here's our favorites:
Cali Grill: go to the lounge early in the evening and have some apps and beverages enjoying the sun set (depending on the time of year.) Come back with your receipt, get a glass of champagne, and watch the fireworks from the observation deck.
Trader Sam's Tiki Terrace: live music, a truly lovely outdoor setting, a view of the castle if you sit in the right area.
Territory Lounge: fantastic wine list, quiet atmosphere. A favorite.
Jiko: The food choices at the bar are great. We had a smaller version of the Sanaa bread service and some great South African wine.
Sanaa: We only had drinks here but the menu includes the famous bread service. Sanaa was a little nutso-crowded but the bar was empty and quiet.
Tambu Lounge: If you are looking for a lively atmosphere, this is the place to be. It is fun to sit and have a drink, the menu looks interesting but we haven't tried the food here yet.
and the best of all....
La Cava de Tequila: I love this place!!! The margaritas and tequila flights are divine, especially with some chips and cheese or guacamole or salsa to dip.