ANSWER:

It’s totally prohibited to participate in such shirk! If your husband is one of them, your marriage is void and you are living in a haram relationship! 

I belong to a joint family where my in laws and his whole family worship azmir and they offer sujud on the north side(sending salam). In the month of rajab they organise 7 days program called oros. I am bound to attend there because I am the youngest. But I don’t follow their rituals. Will Allah punish me for attending there? Is there prayers are valid?