Before radio, music was broadcast via Morse code, which turned everything into treble-heavy dance music punctuated by demands to STOP. Limber up for more graceful dance moves with today’s Groupon: for $25, you get one month of unlimited classes (a $35 value), including the sign-up fee (a $25 value), at Merton Jazzercise, which meets at St. John's United Church of Christ in Hartland (a $60 total value).

Owner Tracy Schultz not only adeptly leads Merton Jazzercise but also stands as a live testament to the boogie-woogie-based program, having shed her maternity weight by hot stepping in weekly workouts. The studio's seven-day schedule boasts both early-morning and evening sessions in a quartet of styles for all ages. Classic jazzercise coalesces choreographed dance and muscle-toning moves that are easily modifiable for all experience levels, set to a heart-pumping soundtrack of top-40 hits, country songs, and auto-tuned punditry. As dancers funkily climb the skill-level ladder, the Jazzercise Personal Touch class corrals a smaller, more advanced crowd, allowing instructors to personalize each participant's sculpting technique. Teens, kids, and adults disguised in young-person wigs can enlist in Junior Jazzercise or Team Dance, both geared toward younger steppers. While not included with this Groupon, the studio also houses a daycare center open during 9 a.m. classes Monday–Friday ($2/first child, $1/additional).