Yoga Classes (Chennai)

Hi
I am currently living in Nandanam and am looking to join Yoga classes somewhere nearby.
I have tried Mission yoga near Park Sheraton (extremenly disappointing), KYM ( too basic except for their long courses for expats) and andiappan yoga (who do not allow you to try one class before deciding to commit for the long term).
Can someone help in idenitfying any other institution conducting yoga classes near my residential location (about 10 to 15 minutes travel radius should be OK)
Thanks
Madhi