Both peon to slave and dates work in 0.3.0c they can just be difficult to notice.
For turning a peon to a slave, go to the slave market, then select the sell tab (don't sell the character), and then select the character you want to enslave, look down near the upgrade button and an enslave button will appear. Just a warning better peons cost more to enslave.
For dates you need to select only the character you want to go on a date with. If you select any other characters (even selecting yourself) it will not work.