"Functional beauty" is often how designers describe mid-century modern architecture and furniture styles. Check out Copeland's Audrey Dining Set, for example. It has a simple, modern, utilitarian look but it's elegant and sophisticated at the same time.
Handcrafted here in Vermont of solid American black walnut wood, the Audrey dining table has an "X" shaped trestle base that allows for maximum leg space. The chairs are streamlined and ergonomically designed for comfort.
Audrey dining room furniture is 100% made in America (here in VT actually) from sustainably harvested wood and can be customized online to best fit your dining space.
For more details and photos of mid-century modern design, check out Stephen Cole's website at MidCenturyModernist.com and Andrew Van Leeuwen's blog on 10 Forgotten Lessons of Mid-Century Modern Design.