Any social situations, really; until recently my daughter was going out with a lad whose mother was terribly sociable and gregarious; her house was always full of friends and relatives, and she kept inviting us along. God, it was awkward; none of us had anything in common with any of them, but it was difficult to keep turning her invitations down.
I agree wholeheartedly about girly shopping trips, although I haven't been asked to go with anybody for ages, thank goodness!
And I hate trips to the cinema with other people (not my immediate family - that's fine). Actually watching the film is OK, but I have trouble with the whole social thing beforehand - who's going to get the tickets? Who wants popcorn? Should I offer to buy for everybody? If they offer to buy for me, should I accept, or are they just being polite, and am I supposed to say, "No, no, that's fine, thanks..."
Well, you get my drift.