The Kitáb-i-Aqdas - The Most Holy Book
Index term: Meetings, Bahá'í
n19.
Save in the Prayer for the Dead, the practice of congregational prayer hath been annulled.
Congregational prayer, in the sense of formal obligatory prayer which is to be recited in accordance with a prescribed ritual as, for example, is the custom in Islám where Friday prayer in the mosque is led by an imám, has been annulled in the Bahá'í Dispensation. The Prayer for the Dead (see note 10) is the only congregational prayer prescribed by Bahá'í law. It is to be recited by one of those present while the remainder of the party stands in silence; the reader has no special status. The congregation is not required to face the Qiblih (Q&A 85).
The three daily Obligatory Prayers are to be recited individually, not in congregation.
There is no prescribed way for the recital of the many other Bahá'í prayers, and all are free to use such non-obligatory prayers in gatherings or individually as they please. In this regard, Shoghi Effendi states that

. . . although the friends are thus left to follow their own inclination, . . . they should take the utmost care that any manner they practise should not acquire too rigid a character, and thus develop into an institution. This is a point which the friends should always bear in mind, lest they deviate from the clear path indicated in the Teachings.
n168.
Ye have been prohibited from making use of pulpits. Whoso wisheth to recite unto you the verses of his Lord, let him sit on a chair placed upon a dais
These provisions have their antecedent in the Persian Bayán. The Báb forbade the use of pulpits for the delivery of sermons and the reading of the Text. He specified, instead, that to enable all to hear the Word of God clearly, a chair for the speaker should be placed upon a platform.
In comments on this law, 'Abdu'l-Bahá and Shoghi Effendi have made it clear that in the Mashriqu'l-Adhkár (where sermons are prohibited and only the words of Holy Scripture may be read) the reader may stand or sit, and if necessary to be better heard, may use a low moveable platform, but that no pulpit is permitted. In the case of meetings in places other than the Mashriqu'l-Adhkár, it is also permissible for the reader or speaker to sit or stand, and to use a platform. In one of His Tablets, when reiterating the prohibition of the use of pulpits in any location, 'Abdu'l-Bahá has stressed that when Bahá'ís deliver their speeches in gatherings, they are to do so in an attitude of utmost humility and self-abnegation.