While feeling the burn during a workout is generally a good sign, feeling the burn while sitting on the sofa means your sofa is in the fireplace. Engage in controlled, constructive body burning with today's Groupon: for $25, new members get a one-month membership (a $65 value) at Flex 24 in Odessa. Though Flex 24 welcomes members to work out 24 hours a day, seven days a week, they require all interested members to purchase a key for $29.99 (not included in this Groupon) for access during non-staffed hours; see fine print for further details.

With a straightforward approach to fitness, Flex 24 grants health-minded Homo sapiens round-the-clock access to workout essentials. Guests can shore up physiques on a full range of brand-name weight equipment, including plate-loaded Hammer Strength and Cybex cable machines, along with 30,000 pounds of free weights. Each cardio unit features an individual LCD TV, allowing indoor runners to compare their form against slow-motion examples from the Six Million Dollar Man and stationary riders to envision their dream of cycling through local news stations. The club encourages self-directed exercise, but experienced staffers keep hours to share iron-pumping pointers and help set up personal-training sessions.

The addition of a black-light–illuminated crossfit and boxing room renders punching-bag battles more mysterious and provides extra entertainment when brandishing bioluminescent dumbbells. Members also have full access to locker rooms and showers for postsession primping and can entertain their toddler tagalongs in Flex 24's clean and safe children's area.