The circuit below may involve anywhere from 2 to 4 people. Once you have completed both exercises in sequence, a full set of the circuit is complete. Next hand the EZ curl bar to your partner. Take a 30 second break while your partner finishes their set. You may want to advice your partner to slow down in order to give you more time to rest. Do as many completed sets of the circuit as you would like (your discretion). I suggest you do no less than 10 complete sets with light to moderate weight, or if your looking for intensity do the exercise until muscle failure. To give your partner more time you can increase your amount of reps also for intensity. BELOW IS A VIDEO OF MY SETS FROM THE BEGINNING TO END
Circuit 1
Bicep curls 6 reps per set until failure
Reverse curls 6 reps per set until failure
then hand the weight to the other person while you rest
As you can see in the video below, I increased my reps half way throughout the workout to give my partner more time to rest.