Symbolism
Space Monkeys:
The space monkeys symbolize the life of the service worker from their boss's perspective. In this case, Tyler Durden is the boss and he refers to all the members of Project Mayhem as space monkeys because if they are told to do anything, they do so without any questions. Just like the space monkeys, the members of Project Mayhem are being used and their only purpose is to do whatever they are told. Tyler devalues the members and treats them like nothing because he has the power to do so.
Cockroach:
A cockroach symbolizes how small Tyler and the Narrator feel compared to the rich dining at the Pressman Hotel. The Narrator points out how the...titans and their gigantic wives drink barrels of champagne (Palahniuk, 80) just to show how puny they feel compared to the bourgeoisie. The cockroach characterizes the feelings of the working-class in relation to the upper-class.