If you mean a big rectangular pizza that's cut into squares, I'd guess 3 pieces per person (or maybe 4 if you've got a lot of hearty eaters, or if that's the only food being served), so whatever would yield 63 (or 84) pieces.
(I feel so mathy!)
eta: pizza x-post! now I'm hungry!
With round pizzas, I'd go for 1-14 to 16" large sized pizza for every 3-4 people.
Be sure to add one extra pizza for me....
How big a sheet? There's a place work orders from that has them 3'x3' and I'd think one of those would suffice. But then I barely eat one piece. Maybe 2 to deal with veg/nonveg issues?
Aargh! It turned into a math problem!
I think I'll get two.
ETA- apparantly I am frazzled enough to think I am sending email!
You can never have too much pizza.
Leftover pizza makes a nummy breakfast treat.
House: Did anyone else hope that
Joel Grey was going to say to Cameron "Hey little girl, would you like to see a trick?" and whip out a cutting implement?
Just me then.
I want soup.
Potato leek or couscous lentil?
I had potato leek yesterday.