Community leader
A community leader was someone who unofficially represented and headed up a community.
In 2369, Benjamin Sisko tapped Quark as Deep Space 9's community leader in the hopes that his business remaining there would encourage others to stay as well. The Ferengi was surprised by his request, but Odo felt the role made sense for someone who had "all the character references of a politician."
Later, Kira Nerys informed him of the new rules for doing business on the space station, saying he couldn't continue to cheat his customers, given his new role as a community leader. (DS9: "Emissary")