All this talk of "power" gives me the impression there is a "versus" viewpoint assumed here. What if the GM asks the player who else is in the bar? What if a player says "what if there's a drunken sailor in the bar?" and the GM enthusiastically agrees? What if a player says that and nobody's excited about that, or somebody (anybody at the table) points out that they are not in a port city? What if the GM and players, I dunno, collaborated on bending the world rather than fighting over it?
(I don't need to ask "what if?" about this because I have a GM who regularly does and encourages all that.)
(It's totally fine to play the power dynamic, by the way, but assuming it is correct, or universally desirable for every table, is not cool.)