Bar/Bat-Mitzvah misconceptions, and preconceived notions

A Bat/Bar-Mitzvah is the Jewish tradition kids have  to celebrate the transition of child to adulthood.

One misconception people and parents have is that this event is a means to convert or persuade a child to become Jewish.

What parents and some people don't realize is this is basically a fun sometimes expensive birthday party, and not a religious event.
I pose the question to anyone reading this and open up the discussion on an event like this or any other event such as a Halloween party or a baptismal.

Would you allow your child to go to a bar/bat-mitzvah, Halloween party, baptismal party, or any other event like this?
If so why, and if not why? 
What are your thoughts on a parent not allowing their child to attend an event like this?
Would you go to an event like this? If so why, and if not why not? 
This blog isn't meant to bash anyone, but to openly discuss opinions and possibly clear up misconceptions.

The reason I posted this blog is I had a Bar-mitzvah in which I was the DJ for that I was honored to be a part of, and everyone had an excellent time, but I found out some parents would not allow there children to attend. They did not want them to be converted to the Jewish religion or persuaded to reconsider there beliefs.