Are these small individual pizzas? I cannot image 24 12"-15" pizzas. That' why I'm asking.
Yes. 24 full size pizzas. A big crowd will graze throughout the evening. It's a little hard to describe, but I'll do my best:
Our kitchen includes a 38" X 74" peninsula. My
mise en place is staged on the counter adjacent to the peninsula so it's at hand but not in my working space.
I stand near the corner of the counter and the peninsula, with the long end jutting to my right and more counterspace to my left. I make pizzas while facing an eating area with a high top table and 4 stools, and just behind that is our DR, which is fully open to the rest of the house, so I can see & hear what's happening there as I stretch and dress the pizzas. My back is to the rest of the kitchen.
I need roughly 8 minutes to prepare a pizza. My husband runs the oven, where it likewise takes about 8 minutes to bake the pizzas at 550°. Good parties wind up in kitchens and these are no exception. Guests area always happy to hang with us as we work.
Most guests are repeat offenders

who know their way around the kegerator, wine, other liquor and glasses. Our son-in-law shows new folks where things are and pours their first drink for them. We also fill a large water dispenser just off the dining room, along with disposable cups and a marker.
The main areas of our house are laid out in a circular floor plan that includes the kitchen, family room, and living room, so kids and adults frequently stream through the kitchen. The kegerator is in an attached garage with a door to it just off the foyer, so people end up gathering in the garage, too.
As pizzas come out of the oven, they're set to cool on the stove top for a couple of minutes, then lined up on side of the peninsula in front of where I'm working. One of our kids or other long-term guests usually slice the pizzas when they've cooled slightly.
The dining room has a 9 X 4 glass table that seats 10 adults comfortably. That's where the cookie decorating takes place. Our daughter usually oversees that aspect of the party for us. I make cutout sugar cookies for the parties - since this will be a large one, I made 300-350 of them yesterday across about 35 different shapes.
Anyone who makes cutout sugar cookies can tell you, that's a lot of work. A lot. Now you know what I mostly did yesterday. We have more different sprinkles than you could imagine, having amassed them over 20+ years of pizza/cookie parties. Many have been gifted to us.
When guests leave, each family leaves with the cookies they've decorated plus a 50 piece assortment of the 8 other kinds of Christmas cookies I make during the season. Sometimes with pizza, too, depending on what's left over on my counter.
The main areas of our house has seating for 36, plus we have folding chairs scattered here and there. A lot of the kids hang in the toy room (converted from a bedroom) or other guest bedrooms down the hall. On their way down the hall, while avoiding their parents' watchful eyes, canny kids stop by cookie trays and and grab a couple of fistfuls.
Pretty much anything goes for the kids at our parties, and on the rare occasion when we notice parents scolding their children, unless it's truly warranted, we smilingly remind them that their children are also our guests, and we want them to have a good time, too.
Our own bedroom is in another area of the house and isn't used during the party. The two bathrooms in the main area of the house have always been sufficient, but if they're both in play our family knows to use the the master bathroom.
I hope that helps give you an idea of how these parties work. It's loosely controlled mayhem, but an absolute joy for us. Most repeats guests tell us it really doesn't feel like Christmastime to them unless they've come to one of our parties that season. The same is true for my husband, me, our children and now our grands.