The gym is a safe place to work out, unlike the home of a stranger who promised you unlimited access to his room full of 20-pound hammers. Work up a healthy sweat with this Groupon.

Choose from Three Options

• $49 for a one-month membership, one personal-training session, and a $10 juice-bar credit (a $105.83 value)
• $99 for a three-month membership, three personal-training sessions, and a $20 juice-bar credit (a $286.49 value)
$149 for a six-month membership, three personal-training sessions, and a $20 juice-bar credit (a $356.49 value)

All options also include aerobic classes such as hot yoga, spinning, and BollyFit, a Bollywood-inspired dance workout. See the schedule. Members can stop by the juice bar to pick up postexercise protein bars or shakes ($3) or grab water or Gatorade to fuel their workouts ($2).

Markville Fitness

Markville Fitness’s main gym reverberates with a symphony of clinks, whirs, and percussive thuds made by exercise equipment from Precor and Life Fitness. There are more than 15,000 square feet dedicated to helping clients cultivate healthy lifestyles and eventually beat their uncles in holiday arm-wrestling matches. In addition to a hot-yoga studio, an aerobics area houses group classes that range from salsa-based cardio to group cycling.

Though members can opt to work out solo, there are also personal trainers ready to tailor workouts to help clients reach specific fitness goals. Afterwards, they can swing by the juice bar to refuel with protein shakes or Gatorade. During workouts, parents can drop their kids off in the daycare studio, which the staff painted in reds, yellows, and purples before furnishing it with plenty of toys and a TV.