Is there anyway for to do something after work for a little extra cash? How would someone make a mod for this type of activity?
(Also what would be some good examples? All I can think of is illegal things. :P)
Good point.
Part time work will, probably, still need to go into jobs.
And those jobs will, probably, need to be sought via solo_activites.
Examples
Bartender
Restaurant staff
Ermmm …
Maybe Cliffski has thought of this for Kudos 2 
No part-time jobs at the moment, but tons of new stuff!