Put the meaning into your own words.

A scarcity of suitable rooms forced the organizers to revise the schedule.

An influx of new participants arrived at the neighborhood board-game evening after the library added it to the printed events list. The organizers checked the distribution of players across tables, finding that most had gathered around two familiar games. Scarcity arose at those tables because there were too few sets for the number of people who wanted them, even while other games sat unused.