What is the ruling on performing Salat al-Tasabih in congregation in the mosque, and is it considered an innovation (bid'ah)?

Salat al-Tasabih (the Prayer of Glorifications) is a supererogatory prayer, and it is permissible to perform it in congregation, as this has been established from the Prophet, peace and blessings be upon him, in numerous narrations. Just as he prayed Qiyam al-Layl (the Night Prayer) in congregation with Ibn Abbas, Hudhayfah, Ibn Mas'ud, Anas, and his mother, and he prayed supererogatory prayers in the house of Itban ibn Malik.

Therefore, there is no harm in leading people in Salat al-Tasabih, especially if it is for the purpose of teaching, and this is not considered an innovation. However, one should not perform it regularly in congregation so that it is not mistakenly thought to be a Sunnah.