I'm not aware of any yoga classes being run right now on Amwaj, which is a real shame. If you DO find any, please let us know!
The closest that I know is in the Somerset Residences in Juffair on Thursdays at 9am. Its about 10-15 min drive from Amwaj. Turn right after the bridge pass Khalifa Park and follow Juffair signs. Its 1min away from BSH. Class is 5BD. Facebook page @ Yoga with Jill.
A friend told me there are classes in zawia on mon and we'd nights at 7:00 and Friday morning at 9:00 am. 4bd.