You can use WooCommerce Restaurant Ordering with any WordPress theme that supports WooCommerce.
Our favorite themes for restaurants are Delicio and Storefront, both of which we have thoroughly tested with.
Delicio from WPZoom is a WordPress theme designed specifically for restaurants. WPZoom have designed it to work perfectly with WooCommerce Restaurant Ordering.
See WPZoom's demo of how WooCommerce Restaurant Ordering looks with Delicio.
The WooCommerce Restaurant Ordering plugin demo uses the free Storefront theme from WooCommerce.com.
If you like, then you can change the design of your restaurant website using one of the Storefront child themes. They have several that are designed for restaurants, such as Bistro and Deli.
More restaurant themes
For more themes, we have an article about the 20 best restaurant themes. You can also read our list of themes which we officially support and test with.