How do i use the party package at the location? Do i have to payanything else or is it just the price on groupon?

We used the Groupon for my godson's birthday. No extra cost unless you want extra pizza or have more children.

groupon price, reservations are necessary and you can order extras some locations allow you to bring a cake etc

Just the Groupon price, unless you want to add extras (i.e. more guests, pizza, drinks)