Here's a short list of some of my favorites (none have entertainment):
-Gurgling Suitcase at Old Key West. Very friendly.
-Territory Lounge at Wilderness Lodge. Prettiest bar on property.
-Victoria Falls at Animal Kingdom Lodge. Second prettiest bar on property.
-California Grill. If you can get up there, it's the buzziest bar on property.
-Belle Vue Lounge at Boardwalk.
John