I'm new to this site and I just finished reading all of the posts related to your new shop. First and foremost, congratulations on your new business venture, The Tea Cupboard. I hope you and your husband are successful.
There is a tea shop that I visit occasionally in Sacramento, CA. It is largely decorated in an art deco theme, but the back of the shop offers different atmosphere for tea drinking. There is a Chinese table setting for two on two carved chairs and a wooden screen where the pair can enjoy tea Gong fu style. There is also seating for four on floor cushions under a Russian tent complete with a low table and Samovar. Finally, there is a boudoir setting with two chairs and a tea cart to enjoy afternoon tea. A tea bar is located at the front of the shop, but I think most patrons enjoy the settings. If you ever decide to steer towards a theme, maybe these will help you.
Best of luck!