Indeed, the regular
custom of reciting Qur'an collectively after Fajr (Dawn) Prayer and Maghrib (Sunset) Prayer or after any other prayer is an act of Bid`ah. Likewise, it is an act of Bid`ah to say Du`a' (supplication to Allah) collectively after ending the prayer. It would, however, be a righteous act if a person recites the Qur'an alone or sits with an assembly of people who study and contemplate the meanings of the Qur'an. The Prophet (peace be upon him) said:
Any group of people that assemble in one of the Houses of Allah to study the Qur'an, tranquility will descend upon them, mercy will engulf them, angels will surround them, and Allah will make mention of them to those (the angels) in His proximity.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.