The tooth fairy still rewards adults who keep their teeth nice, leaving grown-up gifts, such as issues of the Economist and Pontiac Azteks, under their pillows. Grin and win with today's Groupon: for $99, you get an in-office Zoom! teeth-whitening treatment plus a comprehensive exam at Marin Center for Aesthetic Dentistry (a $570 value) in San Rafael.

At Marin Center for Aesthetic Dentistry, Dr. Alex Frade leads a professional staff in serving and protecting pearly whites with an arsenal of cosmetic and preventative dental services. During the Zoom! session, a tag team of scientifically formulated gel and a special lamp visibly whiten teeth up to eight shades in about one hour, undoing years of slurping coffee and gargling with liquid rainbows.

An enamel investigator scours teeth for signs of cavities and other mouth maladies during the comprehensive exam. Marin Center for Aesthetic Dentistry embraces patients in a welcoming atmosphere outfitted in cushy leather couches, blooming flowers, and a sculpture of the tooth fairy constructed from George Washington’s baby teeth.