Family often host informal BBQ. DS (16) enjoys this - he's helped with the BBQ since he was a young boy.
In recent years host will often invite his neighbours. They are nice enough, but it entirely changes the dynamic. It's one thing as a teenager to spend time with older generations within the family, but it's different when there's other much older people who are close friends with the host, but don't know DS (or me) very well.
Obviously it's up to the host who he invites, but DS would rather not go if he's going to spend a lot of time feeling like a bit of a bystander.
If I ask who's going to be there and then say DS can't go after all, I'd be lying.
Might be OK to do that once but not repeatedly.
It would be very rude to say "DS doesn't enjoy Bert and Beryl's company, so he won't come".
Host also has some other friends who DS knows well and enjoys spending time with - they include DS in conversation, so it's not like DS doesn't want to spend time with 'the oldies'.
WWYD?