In "Blendin's Game," when Dipper and Mabel travel back in time, they see Toby Determined, ten years younger, tap dancing there in pursuit of his dream of being on Broadway. Mabel promptly announces that his efforts are fruitless.
It's a grayish brown corner building with a header sign that reads "Heart-A-Tap Dance Studio," accompanied by a silhouette of a ballerina doing a grand jeté. There is a large glass pane that shows into the studio. The inside is a very greyish color with not much else to the empty room beside a metal bar attached to the back wall. No door is seen to enter the dance studio.