The ornamental design for swinging seats attachable to a cabinet or similarstructure, as shown and described.
FIG. 1 is a front-right upper perspective view of the swinging seats showing our new design; wherein the left seat is smaller and is positioned inclined toward the right seat.
FIG. 2 is a front view thereof; wherein the left seat is not inclined toward the right seat.
FIG. 3. a top view of FIG. 2; and,
FIG. 4 a left side view of FIG. 2.
The broken line showing of portions of the swinging seats is included for the purpose of illustrating environmental structure and forms no part of the claimed design.