Services by way of training or coaching in recreational acti

We are a Performing Arts NGO registered under 12AA  – we conduct

1.  dance Coaching Classes and Training classes  ,

2   we are also conducting full time 1years certificate course in Performing Arts

3.  We  perform contemporary   dance based on the requirements of the client .

4.  we give lighting and sound equipments on hire and providing technical support.

Please suggest under which clause of Notification No.   25/2012-Service Tax we are exempted?

 Tax?https://www.servicetax.gov.in/notifications/notfns-2012/st25-2012.htm

Thanks in anticipation