My friend Sarah owns Mountain Base Yoga, which is a local studio that I attend on a weekly basis (it keeps me bendy!). When Sarah took over ownership of the studio, she wanted a website for the studio. And it just so happens that I do that sort of thing! So I built her a website with Drupal 7 that included a Commerce setup to allow users to purchase yoga class packages, automatically-renewing monthly passes, and gift certificates.
In addition to managing her online store, the owner can also create and modify any of the textual content throughout the site. I was given the direction of "light and simple" in terms of design, so I tweaked the CSS of the Bamboo theme - picked because of its built-in responsive design.
Now that the studio has grown, I've also helped her migrate from the Commerce setup to an established studio software package, as well.