Is the classroom loud, absolutely.
Is there energy in the room, to much to describe.
Is everyone participating, yup.
As the game plays out, I stop it about halfway through and create a list on the board of owners & their workers. Later in the game, I stop it again and modify the list to show the changes that have taken place in our 'society.' (the results are below)
What I like the most about this activity is displayed in the Round 1.2 image above. I never discussed corporation, mergers and joining forces...and look what happens. The three 'Owners' that exist later in the game are all corporations that have joined forces to increase their capital and workforce. It is revealing and interesting to listen to their negotiations about who owns the corporation, who has power and who are the workers.
The simulation can be played in 15 minutes, or you can let it play out for an entire period.
I follow up this activity by having students examine excerpts from Karl Marx's writings. They theory that they are exposed to in the readings is easily connected to the experience they went through while playing the game.