Can you have a birthday party here?

I believe so. Ive seen a few kids birthdays they allowed 1 hour and you can bring a cake and decorations. But not all Chick-fil-A's offer birthday parties call and ask ahead of time

I have observed the same.

Yes call in advance and set it up with the manager

I'm sure you can. You can at others.

You should call them ask them

I don't know, you'll have to stop in and ask