I make pulled pork in the slow cooker all the time.
I buy the McCormicks slow cooker seasoning pack, it makes the home made BBQ sauce to cook the pork shoulder in, in the slow cooker. People always freak over it! Esp boys.
Also you could do a couple of your beer can chickens, people always love to see them get cooked if they are not familiar with it.
I have also had some Chili-lime marinaded turkey tenderloins on the grill that have been delish, then you just slice it up and people can eat alone or make little sandwiches on dinner rolls.