Using a gym

We are coming on 11th, next week
and need to find a really good gym that we can pay to use as we are staying in an apartment this time. Can anyone recommend somewhere? I need a decent one that has plenty of barbells and weights, plus machines, and treadmills etc. I would be quite happy to use a local Turkish one, it doesn't have to be a hotel. I'm sure there must be some good ones judging by the number of totally pumped waiters and dancers everywhere. Tried contacting the Aqua hotel direct but had no reply yet. Any help would be great, Thanks!
