Working out is No. 3 on the list of most popular daily activities in America, behind not working out and teaching dogs to swear. Spend your time wisely with this Groupon.

Choose Between Two Options

• $25 for five spinning classes or guided rides (a $75 value)
• $49 for a six-week unlimited membership (a $134 value)

Suited to all experience levels, spinning classes offered throughout the day put groups through intense cardio workouts in a fun, communal environment. During outdoor rides on Saturdays and Sundays, guides lead cyclists around their favorite routes on Santa Cruz's streets or in the mountains. See the schedule for specific class and ride times. Alternatively, a membership bestows holders with beaucoup benefits that include special classes, local discounts, and full facility with lockers, showers, and class access.

Bike Dojo

The accommodating staff at Bike Dojo, a cycling gym founded by Rob Mylls, keeps the community active with two-wheeled activities ranging from indoor spin classes and outdoor guided rides to virtual-reality bikes. Schwinn indoor recreational bikes perch inside the studio space, beckoning exercisers of all levels to pedal their way through energetic classes that boost cardiovascular health and finally put Tour de France commemorative bike shorts to use. Locally attuned guides lead groups on outdoor rides that snake through mountain roads and local trails, and Bike Dojo memberships grant perks such as full access to the facility and discounts on bike parking throughout the city, eliminating the need to dress up your 10-speed as a lamppost's seeing-eye dog.