Launched by 26-year-old Emma Gilby, the sessions combine dance and exercise set to well-loved show tunes from musicals including Hairspray and Aladdin. (Image: Emma Gilby / Huns in the Wild)Held on Mondays and Thursdays from 6pm to 7pm, the instructor said: "It’s what you’d expect from an exercise class really – the only difference is musical theatre music throughout." Classes attract a wide range of ages and abilities, offering easier and more challenging variations of the same moves. "Someone mentioned doing a musical fitness class and I said I’d always thought about it, but never actually done anything. Emma Gilby, 26, from Welwyn Garden City, has been dancing since she was four years old.