Answered by Shaykh Faraz Rabbani
Praying an Optional Prayer in Congregation
Answer:
In the Name of Allah, Most Merciful & Compassionate
In the Hanafi school:
It is disliked to pray nafl prayers in a large congregation or to make it a habit, except the tarawih prayer in Ramadan. [Durr al-Mukhtar, Radd al-Muhtar, Hashiyat al-Tabyin]
However, there is difference of opinion in thissome madhhabs allow it. Thus, one should not condemn or criticize others for doing so, nor make it a cause of division or fitna.
And Allah alone gives success.
Faraz Rabbani