Simulating behavior without actually affecting database

Hey all,

A lot of people use factory girl to simulate behavior without
affecting database, particularly for testing. I have a situation where
this is not for testing but rather someone clicks on button to
simulate behavior but we create a User object in order to run the
simulation but while I want the results of simulation to be stored in
a simulation table I dont want the user to be actually created in user
table. Of course the simulation command uses save! on a user (but it
only saves the user in real live app but not during the simulation).
So do I use factory girl for this inside my models (this is not
testing) or is there another way?

thanks for response