Great drinking buddy because: It's well established across Tumblr that Jon Snow knows nothing, so don't expect sage advice or world weary wit. Snow seems like a good guy though and he's up for anything. If you're trying to watch the game or pick up girls North of the Wall, he might be your ideal wingman.
Potential problems: On second thought, his rugged good looks make him maybe not the best wingman. Also, don't mention the whole "bastard" thing.