Collective Iftar banquet after voluntary Sawm

Q: A group working in the field of Da`wah (calling to Islam) in most of the Algerian universities prepares announcements of communal Iftar (breaking the Fast) on Sundays. They fast on Mondays then convene in a hall and break their Sawm (Fast) together. We inquired about this act, the answer was that they do it for the sake of Da`wah as a means of unifying Muslims. Now, what is the religious ruling in this regard? Is it one of innovated Bid`ahs (innovation in religion), or not?

A: If the situation is as you described in the question, there is nothing wrong with the said gathering or announcing it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.