Make your house the place for the friends to hang out. We would have fondue nights, make your own pasta nights etc Listen and validate your kids. Reward responsible behavior. Restrict privileges for irresponsible behavior. Set reasonable limits. The kids will test them. Enforce them. Tougher when the parents are divorced. Even tougher when the parents do not co-parent. I am a little less strict than I would be if I had a united front with my X.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712