Other family discipline is grounding kids from being able to play with my kids

Our family friends are living with us in our single family home, between the two families there are 5 elementary aged children. This is a temporary, emergency housing set-up but could likely last another 3-4+ more months. Everyone is doing fairly well with it except they periodically ground their children from being able to play with ours, for normal reasons like their kids are fighting and not listening. Its tricky because I respect their right to parent as they see fit but it's a bit disruptive to our family (as my kids ask, want and plan to play together every opportunity) and upsetting to all the kids. They say it's the only thing they can take away that's why they ground them from playing with our kids. I parent completely differently so there's that, but generally we just accept our parenting differences and move on. I don't know... thoughts? Advice? Tell me to suck it up buttercup? via /r/Parenting https://ift.tt/36pxU7u