My friends and I play Dungeons and Dragons (don't judge). They all are friends with a few other people who also play D&D. I find their friends very obnoxious and they are not people who I would want to play a game with.
This comes from experiences I have had previously playing with them and I didn't find myself having any fun. I don't want to straight up tell my friends that I find their friends to be a pain, because I don't want to wreck my friendship with them.
I have tried to simply not invite them (the annoying people) to game nights, but after a few nights they end up invited anyway.
How do I separate my friends from theirs?