Yoga classes in our housing society

All depends on the bye laws  of chs..

It is generally not illegal to conduct yoga classes in your house within a Mumbai CHS, as long as it's incidental to the primary residential use and doesn't cause significant disturbance to other residents. 

The Maharashtra Cooperative Housing Society bye-laws don't explicitly prohibit such activities. 

If the classes are conducted for a short duration and don't cause excessive noise, traffic, or other disturbances, they are generally permissible. 

If the activity becomes a primary commercial venture with significant impact, it might be considered a breach of the society's rules. 

Understand the specific rules related to conducting activities in residential premises.

If necessary, propose a resolution in a general body meeting to clarify the rules and regulations.