Pizza is top notch but on the expensive side. There is no arcade so keeping them occupied could be a problem.
Not a large enough place really to have a children party. Not sure how much.
Should call them. They will need to know how many in your party (kids and adults) and if you are going to order off the kids menu or share a meal.
Not sure how much a kids party would cost, sorry.
You should call your local giordanos and ask them as you have provided no information as to how many children or adults may be in attendance at this party so there is really no way to know.
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