When compared to mixed-gender populations, the members of all-female lizard species are stronger, happier, and 10 times more likely to be named Trisha. Today's Groupon brings together likeminded ladies to increase fitness, morale, and results: for $30, new clients get a one-month unlimited basic membership (a $171.36 total value, including HST) at Curves, a fitness centre designed exclusively for women. Each membership can be used towards unlimited visits and any of the scheduled classes at one of eight locations.

With machines set up in rows to encourage competition, many ordinary gyms cater to men's bodies and psychology, right down to the urinals that were "accidentally" installed in the women's locker room. At Curves, you'll move around a circuit of hydraulic resistance machines that have been designed to work with women's bodies and promote weight loss, protect against osteoporosis, and deal with arthritis. An experienced trainer is always nearby to help manage your machine manoeuvring and your muscle making. Instead of fiddling with weight stacks and losing your momentum, the hydraulic machines use your body weight and fitness level to create resistance that matches your abilities, decreasing the risk of soreness or injury. Because traditional lift-and-lower motions create bulky muscles, each machine uses push-and-pull motions to create toned, lean muscles perfect for crushing a grapefruit without looking like you can.

For 30 minutes, you'll move around a circuit that positions machines inward so that you'll have a chance to laugh with your fellow fitness frontierswomen. Because you're all at different stations, you won't feel like you're in competition with anyone but yourself—and a soundtrack of fun, upbeat music will include cues to let you know when it's time to move on to the next station. You'll raise your heart rate and burn calories during a complete aerobic and strength-training workout. Meet new friends and plan a girls' night out between laboured breaths, or invite along some of your current friends as friends instead of as shields against the creep ogling you at the juice bar.