I'm not 100% positive, but I don't think there is a law in my area prohibiting it. We have an area in Buffalo where in the summer months you see people sitting in patio sections of restaurants with their pets quite often. I'm not really sure if they are actually allowed to do it, or the restaurant and bar owners just look the other way.

I personally don't see why it wouldn't be allowed. You are totally isolated from areas where food is being prepared and it is a totally open air area. Many states that have laws prohibiting certain things within the restaurant (i.e. smoking, shoeless people, bathing suits, etc.) allow them on patio areas. It is also encouraged in nursing homes. You would think if there is a health issue involved - it would be banned within those facilities.