In the Victorian era, people made their cores look tight by wearing corsets, which doubled as bulletproof vests during pistol duels. Strengthen your core until it's naturally impervious to bullets instead with today's Groupon: for $25, you get five Pilates classes or three equipment classes (up to a $75 value) at CoreVibes Studio. Whether you go with the beginner, intermediate, or advanced level, you and a small group of fellow fitness addicts will strengthen the deep, stabilizing muscles of the torso and back in the River Region's only fully equipped Pilates studio. Instead of counting reps and grunts, Pilates focuses on proper form and alignment, zeroing in on precision of movement. Certified trainers will help you get the most out each class, whether you're donating sweat on a mat, using the studio's specially designed equipment, or just obstinately working out on the ceiling. Classes are held seven days a week.