Convention (event)
A convention was a gathering of individuals who had common interests.
In 2369, Quark, noticing an influx of Bajorans to Deep Space 9, questioned if there was a Bajoran convention on the space station he hadn't been informed of, reasoning that he might have to hire more dabo girls. Odo informed him it was a group of orthodox Bajorans making a show of support for Vedek Winn's withdrawal of Bajoran children from the station's school over blasphemous teaching. (DS9: "In the Hands of the Prophets")