It probably means "the waltz in the chair room with (an air of) ennui". So basically, the room with the chairs or the waltz itself is boring or tedious. This piece of music plays in sort of a
bonus room in Cordova which collects all the chairs Hector has sat on throughout the game. Brace yourself, the room even offers explanations on the chairs! I wonder who came up with this sidequest as it's such a strange thing to include in the game.