What are the rules when you're rooming with your mate and he brings a girl back?

Breakfast 04/12/2018

After one of the guys at work found himself in a situation where he's woken up next to a room mate fornicating with a girl while vacationing together, we asked ourselves... What do you do if ya mate brings someone home?

Do you let them have the room by default or do you stand your ground? What's the protocol?

We get to the bottom of it.