Yes, Butt + Picnic = Whole Shoulder. At least half a dozen different muscles each, and I like the picnic every bit as much as the butt. Rather that doing two butts (or picnics) I'll request a whole shoulder, which makes for a nicely monumental presentation. It's pre-order at my usual haunts. If you get someone new, they'll likely go lowest common denominator, and assume you want a butt. So I usually review Dem Bones with them to make sure they know what I mean. At Berkeley Bowl once, they tried to hand me a Cryovac'd pair of butts as a whole shoulder. I caught it in the store, there was an odd symmetry. Picnic doesn't look that much like butt.