No, I never attend them.
I have never been asked to attend by either parent or child.
If the child personally asked me to, I probably would since I wouldn't want to disappoint the child.
However, if I were attending multiple events as you are + it was eating up a lot of my personal time, I would have to politely decline as you need your personal time for YOU and to do things for you only.
No need to feel obligated.
Just let your charges know that as a grown-up, you have grown-up things to do in your free time, however that does not mean that you do not care about them or not want to be there for them. Let them know that you are there in spirit.
