I have a rower, not everyone does. I love adding something monostructural, a fancy word for cardio, into workouts. Airdynes, ski ergs, or just plain old running, any of these will add to the workout.
In this workout I rowed, the equivalent run would be somewhere around 200m. If you can't run, do some burpees.
5 Rounds
300m Row
6 KB C&J @ 24kg
9 Swings @ 32kg