Pork Roast (Boston Butt or shoulder pork roast are best) - 6 or 7 pounds
3 tablespoons coarsely ground black pepper
5 tablespoons (packed) dark brown sugar
3 tablespoons paprika
2 tablespoons coarse salt
1 teaspoon cayenne pepper (you can leave this out if you don't want it spicy)
for a 7 lb roast, I cut it into 3 big pieces, then rubbed the rub on all the sides of it, then threw into the crock pot, poured a little bit of Worcestershire Sauce on low for 9 hours (overnight or all day), then put two forks into the crockpot and pulled all the roast into little shreds. When it is all pulled apart, pour a whole bottle of barbecue sauce over the whole thing and warm that up for about 30 minutes or as long as you want. Serve on buns/rolls.
This makes a lot - probably enough for 15-20 sandwiches (at least). I made this for a ward activity and it was a pretty big hit (I liked it anyway). I would say 3-4 people for each pound of meat - depending on how much they are planning on eating anyway.