Even though this is an old post, others might find this of interest. Cork flooring is a great alternative to carpet as it has many of the same qualities of a hardwood floor since it typically has a polyurethane finish as with hardwoods. This means you get the same easy to clean surface with it being softer, quieter, and warmer to feet than a hardwood floor. Cork comes in glue down tiles and floating planks making it a good choice for most any typical application. We have had cork installed in many high traffic commercial applications with great success. One of the keys to a successful installation of cork is to have a qualified installer as it requires more of a craftsman than most flooring to yield a quality installation.
If you are installing any natural flooring product on a concrete slab, be aware of issues with concrete moisture and alkalinity. Read more about this issue at
www.bellflooringsciences.com/moisture-alkali/