You could give Curves a try. They are an exclusive womens gym. They have a branch in Duhail (opposite Riviera gardens) and on Salwa road. The contact number at the Duhail branch is 4217755. Cost is approximately 3183 (inclusive of admin cost) QR annually, if you pay in one lump sum. Alternatively, you can opt for the tri-monthly package, but it will cost you more in the long run.Good luck.