You will have no problem finding restaurant patio furniture that suits your business's needs, in fact there are dozens of companies out there to buy your outdoor furniture from. Sadly a lot of manufactures of commercial outdoor furniture have forgotten that outdoor furniture can be both durable and comfortable and tend to leave out the comfort part.
You want Your Restaurant Patio Furniture to Be Something You Would Want to Relax In
You should look at this from your customer's point of view, are you going to want to sit have lunch or drinks and an uncomfortable chair or would you rather go down the street to someplace that has a more inviting patio to relax on? If you want to attract customers you need to make sure that your restaurant patio furniture is comfortable, durable and looks great and you do not have to sacrifice one to get the other.