Anonymous wrote:OP. Thanks for the responses so far. (PPs with interfering MILs, that's crazy!! 20:53, why is she there every weekend?! Can't you tell her it's not a good time because you're having company? Ugh! My sympathies.)
FIL is pretty social, so he'd be happy to hang out. I can't imagine him enjoying the sound of people chatting, laughing, etc. while he's off in his own room in the basement (to make it worse, the guest room is right underneath the dining room). He doesn't have his own social scene here and is unlikely to develop one if he moves here, and we don't really know anyone his age and nationality that we could "friend set-up" with him. I guess it comes down to a choice between his feelings and our social life?
Wow no. This is a problem that hasn't even happened yet. You are just speculating on what is going to happen at the party. Invite your FIL and socialize as normal. They are all adults; you don't have to monitor the conversation.