Figure about 1 lb per person. You'll get about 8 oz of meat. Adults can easily eat that. For adult men 1.5 lbs. If kids and mixed adults figure 1 lb. Per person. Left overs are no problem, but not having enough food is a huge social mistake.
At least 3. Maybe 4
I'd suggest getting four portions, tucking in between you, then getting more, fresh, to suit.
The family style pork dinner easily feeds our family of 3.
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