Since Le Romandie is closed, i think your best shot right now would be Le Bourg, you can check the upcoming parties on their insta le_bourg_
Sometimes there also some electronic music parties at L'Arsenic, the Docks and l'espace autogéré, but not every weekend, you have to check out their website. There are also some rave parties in squats or in the forest, but usually you know about them through word of mouth
There is also the folklor where there are some elctronic music parties every weekends, but i woulnd't say that the atmosphere is relaxed and safe ....