This activity is titled "Would we stay friends if....?"
Students make up goofy or serious things that they're sorry for (pretending) using the past infinitive. They have mini-conversations with up to 15 different classmates, saying what they're sorry for, and each partner has to say if they decide to stay friends or not after what they just heard.
A: I'm sorry for having lost your homework!
B: We can stay friends!
A: I'm sorry for having gone out with your brother.
B: We can't stay friends!
If you are teaching the French past infinitive, you may be interested in my bundle of activities at 25% off the individually-priced items here: