How about 5 Cornish Hens?
We wanted to get a dutch oven for our anniversary this summer. Started looking on Amazon and found one that was 62% off. The information was a bit fuzzy on the size, but it seemed to be a deep dish 14 inch , based on the quarts. Maybe a big larger than we needed. Still, who could resist 62% off!
Turned out to be a standard 16 inch. It is HUGE! So we hadn't used it yet. James decided he wanted dutch oven cooking for his birthday dinner. He found a dutch oven recipe for Cornish Hens, calling for 5 birds. Perfect! You don't cook that in your normal 12 inch dutch oven! And we were having the Sister Missionaries over for dinner, so one for each adult and one for the girls to share. Actually, I ended up sharing one with the girls and the missionaries took home the rest of theirs in doggie bags, along with the leftover one.
I think we might do this again when Mom and Dad are here. It's such a fun meal with great presentation appeal. Also thinking a 16 inch dutch oven would be great for pizza.
Oh, and we have a nice brick fireplace type thing on our back porch. It's a homemade contraption and quite cool. But even that wasn't large enough for this monster dutch oven! Fortunately it has a metal top, so I used it as a charcoal table and that worked out just great. I put some more coals inside the brick fireplace and threw on some foil-wrapped potatoes, which I replaced with the dessert (lazy cobbler...chocolate cake mix, 2 cans cherry pie filling, 2 sticks butter, butterscotch chips) half-way through cooking the chicken.