For unilateral exercises (e.g. lunges), it should be possible to do one drop set (another set without a break but with weight reduction) per side, e.g:

Lunges:

Satz 1: L&R, 10x50kg

Satz 2: L&R, 10x50 kg

Satz 3: L: 10x50 kg

Satz 4: L. 10x0 kg

Satz 5: R: 10x50 kg

Satz 6: R: 0x50 kg