Personally, if I've only anesthetized the side that i'm working on, I'll use the articulating paper on that side only about 98% of the time, and then just simply ask the patient if on the opposite side where they're not numb if their bite "feels normal" - If I see that where I worked and the patient is numb that the occlussal contacts appear to be "normal" AND the patient says that their bite on the opposite side feels "normal" then I'm happy with that 98% of the time. The other 2% would be if the patient has some "interesting" occlussion (i.e. very few opposing contacts, crossbite situations, HEAVY bruxism, etc) where I'll then check the occlussion with articulating paper on both sides prior to dismissing my patient.
Most of the time your patient's will have to think about if their bite feels "normal" even where they're not anesthetized, vs. they'll tell you in about a millisecond if they're bite feels "off"