BamaVol Jr #3 turns 18 today. He wants to be taken to a local Japanese restaurant - the kind where you sit around a grill and the cook puts on a show. I've been there before but someone else has always paid. So, I have no idea how to tip. Do I make one tip (~20% of the food/drink tab) and let the waitress & cook decide how to split it or do I tip them separately? I don't want the waitress keeping the whole thing for simply bringing drinks and clearing plates.