Hello! This is my very first post!! 
We are having my son's B-Day at Chef Mickey's October 2nd. We will have a group of 8-11, but my problem is that a couple of guests will not know until at most a month before if they will be able to be there that day!
How will they react if I reserve for 11 and only 8 show up? I know it's not an issue normally, but I wondered since it is a restaurant that regularly books up solid.

We are having my son's B-Day at Chef Mickey's October 2nd. We will have a group of 8-11, but my problem is that a couple of guests will not know until at most a month before if they will be able to be there that day!
How will they react if I reserve for 11 and only 8 show up? I know it's not an issue normally, but I wondered since it is a restaurant that regularly books up solid.