The venue décor will determine the chair. A more sophisticated dining experience will see the inclusion of a high back upholstered chair or possibly a low back chair to provide the illusion of the larger space. Upholstery does however bring with it the necessity to undertake a regimented cleaning regime. Even the most expensive commercial grade fabrics will not resist red wine, die from the guest favourite blue jeans or the odd stud that rips the fabric (that is jean studs). I have a strong leaning towards Warwick fabrics, a local provider that has a wide selection for dining environments.