New Yorkers who want more marble in their workouts can now exercise at the Met, not with trainers but "athletic docents."

Make no mistake: this is a workout. Your body will perspire, your heart rate will rise and you’ll shed any light layers. (That said, my one request would be to increase the cardio incrementally and start with more stretches that early in the morning.) And because our enjoyment of anything increases when it’s otherwise prohibited, the workout’s massive pleasure derives from its illicitness: “trespassing” the Met before opening hours, writhing to Elton John within the galleries, gently sweating on various marble surfaces. It confers other singular bragging rights as well — like having done jumping jacks before the marble statue of a nude Perseus.