At the Prancing Pony Inn the hobbits are sitting at the table, Frodo on the end with Sam next to him and Pippin across from him. Merry comes to the table with his pint and sits across from Sam then Pippin says he's going to get a pint and leaves. Next shot Frodo stops the owner as he passes and you can clearly see Pippin's back sitting at the table across from Frodo again and Merry is gone, next shot Merry is back across from Sam and Pippin is at the bar. (Merry didn't move over to sit across from Frodo then move back again because it's clearly Pippins coat you're seeing, they're wearing different colors)