My wife and I are 50's PTC perennials. I think my wife goes to Disney for nothing but the shakes. FYI, she ranks PTC, Beaches and Cream, and Sci Fi as the best in Orlando. To me they all taste the same, she's the connoisseur!
A suggestion: We always go on Saturday when the lunch hour is the heaviest. Amy orders her shake from the bar and I sit on one of the fine, vintage vinyl couches. There is almost always some sort of "street theater" going on, I'm assuming to entertain guests. During our September trip, there was a male and female comedian. The guy was dressed in white undershirt and coifed with a ducktail hairdo, and the gal was in a poodle skirt and ponytail. It makes the bar and lounge area a madhouse -- and a fun one at that!