Do you have to call and reserve spot at Benihana?

I never went to Benihana without a friend of mine who knows his way around things at that place. He would always have to call Benihana so he can reserve a spot for me and my friends. Do you have call them first to reserve a spot there or you can just walk in?|||I have found that going for an early Lunch, then sometime you can just get a couple of seats. For evening then you would be advised to book. That is for the restaurant in central London.|||i recomend you to just reserve your spot before you walkin..