Abstract: An armrest for arena, stadium, classroom and auditorium seating. The armrest includes a base and an interchangeable arm cap secured to the base. The base defines a rectangular recess sized to telescopically receive a support leg, the recess including vertical crush ribs to retain the support leg within the recess. The arm cap is releasably joined with the base opposite the recess and is interchangeable with multiple different arm caps while the support leg remains inserted in the recess. The arm cap can include any desired finish, and can extend over the interface between the base and the arm cap to provide a clean appearance.