The Djemaa el-Fna zone — broadly, anything within 200 metres of the square — is the liveliest and loudest part of the medina. Music, food stalls, and the general roar of 80,000 tourists carry into rooms until after midnight. Some couples love the energy; others find it impossible to sleep before 1 am. Unless the riad has very good sound insulation and a self-contained rooftop, it is worth being further away.
Mouassine (northwest medina) threads the needle well — atmospheric, walkable to the major sights, but residential enough to be quiet by 10 pm. Some of Marrakech's finest boutique riads are tucked into its lanes: the scent of orange blossom from the gardens of Dar el Bacha drifts across the neighbourhood.
The Kasbah district, near the Saadian Tombs and the Mellah, is the quietest corner of the old city. It is less tourist-dense, slightly further to walk to the souks, and genuinely tranquil at night — an easy choice for honeymoon stays where undisturbed sleep is part of the plan.
Bab Doukkala and northern medina riads tend to offer the best value-for-intimacy ratio. The area feels more locally lived-in — butcher shops and neighbourhood hammams sit alongside boutique doors — and it is blessedly free of the worst tourist-trap restaurants.