Even if there's nothing going on go in and visit for the architecture. Usually there an art exhibition going on and in season many events usually in arabic. I go for the art exhibits and the music events because my morrocan is not that good but they also have conferences and lectures.
Dar Souiri arranged for myself to obtain a wheelchair for my 80 year old mother whilst we were holidaying in Essaouira. My Mother has mobility issues and can't walk very far unaided. This improved the quality of my and my mother's holiday experience beyond words! Thank you so much Dar Souiri!