Does that go for everything, LtEve? Any parties/get-togethers/meals/other social occasions that friends have organised?
Janine, pretty much, yes.
I would go to something with my friends if it was during the day and DD was at school - we lunch together quite often.
I went to my colleagues wedding on a weekday lunchtime for that reason, and DH and DD were invited to her uncles house for a party afterwards.
I don't go to evening events unless I can count on a family memeber for childcare, and as we live 1 hr 30 mins from closest family, that doesn't happen often, maybe twice a year.
I wouldn't go to an all day and overnight wedding away from home unless DD was also invited.
That's my choice and I've never been huffy about a choice of my own making (see my post above about the housewarming BBQ) and none of my friends or family have given me any grief for making that choice.
Next weekend we are going to a wedding anniversary dinner involving 30 people. DD is also going, we will have a good time, DD will behave herself and all is good with the world 
DD wants to be with us, she'll be a teen soon enough and desperate to get away. I'm enjoying what little time I have with her 