Getting in shape is a challenge almost as difficult as reading an entire dictionary or climbing a tree that's covered in canola oil. Enlist expert help with this Groupon. $39 for One Month of Unlimited Kickboxing Classes (a $99 Value) In one-hour classes, instructors keep things simple, eschewing trendy fitness routines that can complicate working out by limiting students' action to simple kicks and punches. During the deceptively heavy-duty routine, students attack suspended heavy bags while they tone muscles from their heads to their surprisingly strong big toes. See the full class schedule.