Rowing.

[Noodley]

My neighbours spend all day rowing with each other. What a racket.

 

[Aperitif]

Cheap oars?

 

[Landslide]

My neighbours spend all day rowing with each other. What a racket.

Surely that's tennis?

 

[Radius]

Cheap oars?

(arse-lickey post I'm sure I'll be picked up on, but it had to be appreciated. Although perhaps plaudits to Noodley because I suspect he had this very wordplay already in his head)