In Shakespeare's day they were called groundlings because their one-penny admission only entitled them to stand on the gound in from of the stage.
they are called the gallery
they are the gallery
A group of spectators are called an audience.
An assembly of listeners or an assembly of spectators is use of the collective noun, assembly.
spectators
horny grasshoppers
spectators
they are the gallery
spectators
The spectators on the highest stadium-tier had poor visibility.
Spectators, crowd or audience.
The collective noun is called a gaggle. Also spectators